6. The patients will have to wait all day _______ the doctor works faster.

　　A. if B. whether C. unless D. that

　　if (如果) whether(是否) unless(除非) 答案 C

7. She remained silent， _______ her heart was heavy and her spirit low.

　　A. so B. though C. for D. therefore

　　so (所以) though(尽管) for (因为) therefore (因此) 答案 C

8. In the world no country has exactly the same folk music ________ that of any other countries.

　　A. with B. as C. to D. like

　　the same as 和……一样

　　as： 连词。谈到人或事物彼此都有相同点时表示比较 This is the same one as that you had before.

　　Like： 介词。 Like me， she enjoys all kinds of music. She enjoys all kinds of music， as I do.

　　在口语中like 可以做连词=as Nobody understands him like/ as I do. 答案 B

9. My brother likes country music， _______ I like pop music.

　　A. when B. where C. while D. because

　　when (当……时候) where (在哪儿) while (当……时候;相反) because (因为) 答案 C

10. ________ it is very late now， the students are still working in the lab.

　　A. As B. When C. If D. Although

　　as 因为 when 当……时候 if 如果 although 尽管 答案 D