All the students in the class _______ a loud laugh when the professor told them a joke.

A. let up                B. let down                   C. let off               D. let out

1. The school students ________________ (负担)heavy studies now.

2. Don’t ______________________ (产生误会) what I said.

3. The students are listening to the teacher carefully with ____________________ (他们的眼睛紧盯着) the teacher.

4. She had only two yuan with which to buy a book which __________________(值得读).

5. The patients with AIDS ___________________(被很好地照顾)in this hospital.

_______ you read the instructions closely, you would know what I _______ referring to now.

A. Had; was　　　　　　　　　　　　　　　　　　　　　　　　　　 B. Should; am

C. Had; am　　　　　　　　　　　　　　　　　　　　　　　　　　 D. If; was

 This hard-won result is still of great _______ to the current Cross-Straits relations and should be upheld.

A. significance                                                 B. significant

C. sense                                                          D. sign

 The doctor recommended he _______ a few more days in hospital.

A. stays                                                           B. to stay

C. stay                                                                   D. would stay

 He _______ a number of books about the subject in the library before he gave his speech.

A. referred                                                              B. looked into

C. consulted                                                    D. looked up

 _______ is often the case, he didn’t study hard and failed to pass the test.

A. What                       B. As                            C. It                      D. Which

It _______ there is a disaster _______ people will think much of safety.

A. is until; when　　　　　　　　　　　　　　　　　　　　　　　 B. is until; that

C. isn’t until; when　　　　　　　　　　　　　　　　　 D. isn’t until; that

A teacher’s _______ to education is worth great respect of the whole society because it brings benefits to the development of society.

A. devotion　　　　　　　　　　　　 　　　　　　　　　　　　　 B. principle

C. identity　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 D. guidance

 He lost his job three months ago; _______ , he was seriously injured in an accident last week.

A. in the first place                                    B. to make matters worse

C. on the contrary                                            D. in other words