1.I need_____some emails.
a)to answer
b)answer
c)answering some emails. 2.The situation is difficult____
a)for explain
b)explain
c)to explain
3.I don't know what____
a)do
b)to do
c)that I do
4.I don't really mind____housework.
a)do
b)to do
c)doing
5.______is one of the best forms of exercise.
a)Swiming
b)Swimming
c)Swim
6._____bring our books tomorrow?
a)Do we have to
b)Have we to
c)Do we must
7 It's free. You____pay
a)don't have to
b)mustn't
c)haven't to
8 .You must_____your grandmother.
a)to call
b)calling
c)call
9.You_____drink so much coffee.
a)not should
b)don't should
c)shouldn't
10.I think you should___to her about it.
a)to talk
b)talk
c)talking
11 If she_____ , she won't come back.
a)goes
b)went
c)'ll go
12.If they don't come soon, we___them.
a don't see
b won't see
c aren't see
13.Call me if you_____a taxi.
a won't find
b don't find
c didn't find
14.A Whose book is that? B It's_____
a my
b mine book
c mine
15.She forgot his birthday, but he didn't forget_____. a her
b she
c hers