29．I don't think sixteen-year--olds should ________ to go to bars．

A．allow                         B．be allowing          C．not allow                      D．be allowed

28．There ________ many trees on the hill．But now all the trees are cut down．

A．used to be            B．used to                C．was used to            D．was used to be

27．--He used to play tennis，but now he's on the swim team．

-- ________

A．People sure change．                                B．Good idea．

C．Thanks．                                                   D．All right．

26．You'd better ________ smoking，________ you will get ill．

A．go on，so            B．give up，and       C．give up，or         D．end up，or

25．If I ________ a bird，I ________ fly freely in the sky．

A．were，will                                             B．were，would

C．was，would have                                       D．was，were going to

24．I don't have a present．What if ________ brings a present?

A．everyone other       B．anyone other        C．everyone else          D．else everyone

23．What ________ you do if you won a million dollars?

A．will                     B．would                  C．shall                      D．should

22．Sam enjoys ________ stamps．And now he has 226 of them

A．to collect             B．collected              C．collects                  D．collecting

21．I study for a test ________ working with a group．

A．in                       B．by                       C．at                          D．to

20．There are ________ people in Sam's family．

A．three                   B．two                     C．one                     D．four

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