Unit 7&8 revision

I need ____ some emails.

• to answer

• answering

• answer

The situation is difficult ____.

• for explain

• explain

• to explain

I don't know what ____.

• do

• to do

• that I do

I don't really mind _____ homework.

• do

• doing

• to do

______ is one of the best forms of exercise.

• Swimming

• Swiming

• Swim

_____ bring our books tomorrow?

• Do we have to

• Have we to

• Do we must

It's free. You ____ pay.

• don't have to

• mustn't

• haven't to

You must ____ your grandmother.

• to call

• calling

• call

You ____ drink too much coffee.

• not should

• don't should

• shouldn't

I think you should _____ to her about it.

• to talk

• talk

• talking