Question

这3道选择题 选哪个？

18. I don’t know if he ________, but if he ________ I will let you know.
A. comes, comes B. will come, will come C. comes, will come D. will come, comes
19. You can contact us by telephone or e-mail, _________ you prefer.
A. whenever B. however C. whichever D. whatever
20. This is a very useful book. I’ll buy it, _________.
A. how much may it cost B. no matter how it may cost
C. however much it may cost D. how may it cost

Answer 1

D
C
C

Answer 2

答案：第一题D
第二题C
第三题B

Answer 3

D(第一个if 是‘是否’的意思，第二个if 是‘如果’的意思） C C

Answer 4

18，if he will come 他是否会来； 主将从一般（语法）but领导条件从句
19，C ： whenever 不论何时 however 不论如何 whichever 任何一个
whatever 不管什么样的 前一句已经限定是方式，所以选C
20，C,不管花多少钱

Answer 5

D
C
C