There is a bad smell here.

I ________ the gas.

[　　]

A．forget to turn off

B．must forget to turn off

C．must have forgotten to turn off

D．must have forgotten turning off

完形填空（共15小题；每小题2分，满分30分）

阅读下面短文，掌握其大意，然后从下列各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

The human nose is an underestimated tool. Humans are often thought to be  1___ smellers compared with animals, but this is largely because, unlike animals, we stand upright. This means that our noses are  2  to detecting those smells which float through the air,  3  the majority of smells which stick to surfaces. In fact though, we are extremely sensitive to smells, even if we do not generally realize it. Our noses are capable of  4  human smells even when these are  5  to far below one part in one million.

　　  6     , some people find that they can smell one type of flower but not another, while others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate  7     smell receptors in the nose. These receptors are the cells which sense smells and send  8    to the brain. However, it has been found that even people insensitive to a certain smell at first can suddenly become sensitive to it when  9     to it often enough.

　　The  10   for insensitivity to smell seems to be that brain finds it  11    to keep all smell receptors working all the time but can  12   new receptors if necessary. This may also explain why we are not usually sensitive to our own smells we simply do not need to be. We are not  13     of the usual smell of our own house but we  14     new smells when we visit someone else's. The brain finds it best to keep smell receptors _ 15    for unfamiliar and emergency signals such as the smell of smoke, which might indicate the danger of fire.

1. A. sensitive	B. outstanding	C. insensitive	D. awkward
2. A. limited	B. committed	C. devoted	D. conducted
3. A. catching	B. ignoring	C. missing	D. tracking
4. A. distinguishing	B. discovering	C. determining	D. detecting
5. A. reduced	B. reserved	C. rescued	D. refused
6. A. Fortunately	B. Strangely	C Happily	D. Amazingly
7. A. unusual	B. particular	C. unique	D. typical
8. A. signs	B. information	C. messages	D. signals
9. A. subjected	B. left	C. drawn	D. exposed
10A. expectation	B. expression	C. extension	D. explanation
11.A convenient	B. competitive	C. inefficient	D. adequate
12.A introduce	B. gather	C. develop	D. produce
13.A sure	B. sick	C. aware	D tired
14.A tolerate	B. resist	C. neglect	D. notice
15.A available	B. reliable	C. valuable	D. suitable

阅读下面短文，掌握其大意，然后从所给的A、B、C、D四个选项中，选出最佳选项。

Nancy had just got a secretary's job in a big company to work in the sales department. Monday was the first day that she went to work, so she was very 　31 .She got up very early and arrived at the 　32　 at twenty to eight. She 　33　 the door open and found nobody there. “I am the 　34　 to arrive.” She thought and came to her desk. She was surprised to 　35　 a large bunch of flowers on it. They were fresh. She 　36　 the flowers from the desk and smelled them. “Oh, how lovely!” Nancy 　37　 joyfully. She then looked round for a 　38　 to put them in. “Somebody has sent me flowers the 　39　 first day!” She thought happily. “But who could it be?” She began to wonder.

    The day passed very 　40　 and Nancy did everything with great interest and 　41　 .For the following days of the week, the first thing Nancy did was to change water for the flowers. And then she 　42　 herself in her work.

    Then came another Monday. When she came near her desk she was overjoyed to see a(an) 　43　 bunch of flowers there. She quickly put them in the vase, replacing the old ones.

    The same thing happened again the next Monday, Nancy felt it 　44　 and this time she began to think of ways to find out the 　45　 .

    On Tuesday afternoon, she was sent to 　46　 a plan to the general manager's office. She had to stay for a while at his secretary's desk 　47　  his directives .She happened to see on the desk a big note book 　48　 “Records of managers' meetings”, and glanced at the 　49　 pages. Suddenly her eyes fell on these words: “In order to keep the secretaries 　50　 ,the company has decided that every Monday morning a bunch of fresh flowers should be sent to each secretary's desk.”

    Later, she was told that their general manager was a business management psychologist.

1.A. depressed                 B. encouraged                  C. excited                   D. surprised

2.A. office                          B. workshop                      C. Classroom           D. bookshop

3.A. forced                         B. pushed                           C. Turned                  D. knocked

4.A. last                    B. second                           C. Third                     D. first

5. A. uncover                     B. smell                              C. Find                       D. pick

6.A. picked up                   B. threw away                  C. stared at              D. took up

7.A. cried                           B. Laughed                        C. wept                     D. replied

8. A. jar                     B. Box                                 C. bottle                             D. vase

9. A. happy                        B. very                                C. funny           D. quite

10.A. slowly                       B. normally                        C. quickly                  D. hardly

11.A. wisdom                    B. bravery                          C. passion                 D. enthusiasm

12. A. buried                     B. dressed                         C. Devoted               D. seated

13.A. old                             B. Red                                 C. blue                       D. new

14. A. special                    B. angry                              C. strange               D. difficult

15.A. sender                     B. receiver                         C. manager              D. waiter

16. A. send for                  B. hand out                        C. try out                  D. hand in

17.A. asking for            B. waiting for           C. looking for         D. searching for

18.A. marked                    B. written                          C. printed                 D. signed

19.A. closed                      B. damaged                       C. pinned                  D. half-opened

20.A. at home                   B. on time                          C. in high spirits      D. in low spirits

 

Behind our house is the start of a fascinating trail (小径). This trail is one of the old roads that wind through untold miles of forest. My 　1 , Beans, and I walk the trail frequently. Normally, Beans sniffs alongside the 2　 to follow the smell of a deer track or 3 some cause known only to him.

　 Beans is a white dog, quite handsome and very 　4　 . He not only understands what

we tell him, but also often makes sounds as if he were trying to 　5 back.

　 One morning, we took a different route, which led us to a(n) 　6　 trail. I was sure this trail would eventually lead us to our familiar 　7　 . But, no. We seemed to be far off course. After two hours, I suddenly realized that Beans probably 　8　 the way home. So I urged, "Beans, take me home." He ran down a new trail. But it merely led to an intersection (岔道口) of trails.

　 Soon it became 　9　 that we were getting nowhere. I began to picture the rest of the day in the 　10 , without food or drink. We had walked about ten miles. But Beans seemed totally 　11　 . The sniffing and exploring was going well for him.

　 Finally, we 　12 a crossroad near a highway. Lady Luck suggested I should turn left. We did and 13　 　reached a cottage beside a field. I knocked on the door and explained my situation to an old man. He laughed and then 14　 us home.

　 Since our adventure, I 15 that Beans probably knew all along how to get home.

He was just having too much fan exploring new trails.

1. A. deer	B. dog	C. lady	D. man
2 　 A. route	B. road	C. trail	D. way
3.　 A. imagine	B. consider	C. explore	D. present
4.　 A. smart	B. sweet	C. slow	D. shy
5. A. turn	B. kick	C. jump	D. speak
6 　 A. unfamiliar	B. similar	C. indifferent	D. changeable
7. A. driveway	B. path	C. crossroad	D. highway
8. A. knew	B. saw	C. showed	D. made
9. A. mysterious	B. ridiculous	C. fascinating	D. apparent
10. A. house	B. forest	C. field	D. cottage
11. A. unconcerned	B. unconscious	C. undecided	D. uncomfortable
12. A. left for	B. went off	C. came to	D. drove toward
13 A. punctually	B. frequently	C. formally	D. shortly
14. A. walked	B. drove	C. sent	D. carried
15. A. regretted	B. remembered	C. concluded	D. confirmed