.Among all the problems,_______is so difficult as this one.

A.not one            B.either     C.neither          D.none

______that he was in great danger, Eric walked deeper into the forest.

A. Not realized     B. Not to realize     C. Not realizing   D. Not to have realized

—  Did you have a good time in the US during the Golden Week Holiday?

   — ______ Due to the temporary government shutdown, a lot of national parks were closed.

A. Not really.      B. You’re right.   C. Oh, great!      D. Yeah, why not?

_________ the task , they have to stay there for another two weeks.

   A. Not completing    B. Not completed    C. Not having completed  D. Having not completed

Three engineers(工程师) and three accountants (会计) were traveling by train to a meeting. At the station, the three accountants each bought a ticket, but the three engineers bought only a single ticket. “How are three people going to travel    36    only one ticket?” asked an accountant. “Watch and you’ll see,” answered an engineer.

    They all    37   the train. The accountants took their own    38   , and all the three engineers went into a restroom and   39    the door behind them. The train    40   the station, and after a while the conductor (售票员) came to    41    tickets. He knocked on the restroom door and said, “Ticket, please!” The door opened just a    42    and a single arm appeared with a ticket in hand. The conductor    43    it and moved on.

    The accountants saw this and    44    it was quite a clever idea.    45    after the conference, the accountants decided to    46    what the engineers did on the return trip and    47    some money.

    When they got to the station, they bought a single ticket for the return trip. To their 48    , the engineers bought no tickets    49   .

“How are you going to travel without a ticket?” asked one    50    accountant. “Watch and you’ll see,” answered an engineer.    51    they got on the train the three accountants went into a restroom and the three engineers went into another one that was   52   . Then the train started. Shortly afterwards(不久之后) , one of the engineers left his restroom and walked    53   to the restroom   54   the accountants were    55  . He knocked on the door and said, “Ticket, please!”

1. A. in                B. at               C. with             D. to

2. A. put on            B. got off     C. got on       D. put off       

3. A. seats             B. chairs       C. desks            D. tables

4.A. closed             B. hit              C. opened       D. knocked

5. A. arrived           B. left         C. walked       D. passed

6. A. get          B. put              C. collect     D. fetch

7. A. hole              B. cut              C. half             D. crack

8. A. brought           B. took             C. held             D. returned

9. A. expected      B. agreed       C. showed      D. advised

10.A. So                B. Although     C. Or           D. But

11. A. learn            B. copy         C. tell             D. praise

12. A. save        B. earn             C. make         D. spend

13. A. pity        B. fear             C. joy          D. surprise

14. A. above all       B. after all        C. at all           D. in all

15. A. frightened      B. puzzled      C. excited      D. scared

16. A. After            B. Since        C. During       D. Before

17.A. not near          B. not far      C. not nearly       D. not closely

18.A. on            B. up          C. at          D. past

19.A. which          B. that       C. where        D. at where     20. A. hiding           B. standing     C. sitting          D. resting