Ⅰ.用适当的情态动词填空
1．They may/might be having a meeting，but I'm not sure.
2．When he lived in the countryside，he would go fishing every day.
3．If you will help us，we shall be very grateful.
4．Don't worry，you shall get the answer this afternoon.
5．Can he have gone abroad when we got there?
6．He must have been to the island，for he knows a lot about it.
7．George can not have gone too far.His coffee is still warm.
8．You need not have worried — it all turned out fine.
9．The flowers have died.I should have watered them often.
10．He could have passed the driving test at the first attempt，but he was too nervous.
