1 I need ____ some emails., a to answer, b answer, 2 The situation is difficult ____., to explain, for explain, 3 I don’t know what ____., to do, that I do, 4 I don’t really mind ____ housework., to do, doing, 5 ____ is one of the best forms of exercise., swimming, swim, 6 ____ bring our books tomorrow?, Do we must, Do we have to, 7 It’s free. You ____ pay., mustn’t, don’t have to, 8 You must ____ your grandmother., call, to call, 9 You ____ drink so much coffee., don;t should, shouldn't, 10 I think you should ____ to her about it., talk, to talk, 11 If she ____, she won’t come back., ’ll go, goes, 12 If they don’t come soon, we ____ them., won’t see, don’t see, 13 Call me if you ____ a taxi., don’t find, won’t find, 14 A Whose book is that? B It’s ____., my, mine.

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