初三英语奥赛题 (情态动词部分)

初三英语奥赛题 (情态动词部分)
请各位把选择正确答案的原因附上,
1.What happened to the young trees we planted
-The trees ____ well,but I didn't water them.
A minght B needn't have grown C would grow D would have grown
2.Nancy ____ the letter from her mother .
-No ,she can't have .The postman hasn't come yet.
A can't receive B.can have recieve
C.nust have recieved D.must recieve
3.They have been there the day before yesterday ,_____
A.mustn't they B.didn't they C mustn't have they D.had they
4.Why do ou make me do so
--I am sorry that you ____ do such a thing .
A.would B.can C.should D.may
5.What would have happened ____ ,as far as the riverbank
A.if Bob has walked farther B.if Bob should walk farther
C.had Bob walked farther D.if Bob walked farther
6.Do you still remember the day when we when we went to the Great Wall?
--I can't remenber it well,but ____ sometime last autumn
A might it be B could it have been
C.could it be D.must it have been
7.When a pencil is partly in a glass of water ,it looks as if __
A.breaks B.has broken C.were broken D.had been broken
8.I can't get through to the general manager's office anyhow
-The line is busy .Someone ____ the telephone .
A.must use B.uses C.must have been using D.must be using

1、D 是虚拟语气,原本可能会长得很好,但……
2、C 通过上下文可知过去发生,所以有have,根据逻辑关系可知为C
3、B （原题中应该是they must have been…吧）反义疑问句,就否定形式；有时间短语,用didn't
4、C should表示说话人的意愿,由上句知是说话人让另一人做的某事
5、C 过去式的虚拟语气,if...had done.选项中提前had用倒装,
6、C 推断性的情态动词的用法,can不用于肯定句,may不用于疑问句,must只用于肯定句
7、C 现在时的虚拟语气,
8、D 推断性的情态动词的用法,现在进行时,