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33.Don’t blame Harry. _______ was I who opened the letter.

    A.This           B.That           C.There          D.It

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32.-Have you got permission __________ here?

-Yes.

    A.to stay         B.staying         C.having stayed    D.to be staying.

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31.-Where are the signs you mentioned?

-They’re easy to find, if you know ______________.

    A.whether to look                  B.what to look

    C.who to look                     D.where to look

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30.-Excuse me, did you notice anyone ___________ out?

-I’m afraid not.

    A.going          B.is going        C.go            D.would go

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29.-Have you called 119?

-As soon as I saw the smoke, I called the firemen, but they _________ yet.

    A.didn’t arrive     B.hadn’t arrived    C.haven’t arrived   D.wouldn’t arrive

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28.___________ a plane flew by, but mostly the sky remained clear.

    A.In time                        B.On time       

    C.From time to time                                D.At the same time

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27.Many teachers believe that students ___________ to experiment with new ideas.

    A.should encourage                 B.should be encouraged

    C.might encourage                  D.might have encouraged

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26.The treatment will continue until the patient reaches the point _________ he can walk correctly and safely.

    A.which         B.where         C.when          D.that

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25.The vase had been put on top of the cupboard _________ it wouldn’t get broken.

    A.in case of       B.as if           C.so            D.when

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24.-Hurry up! You will be late!

-I hope they haven’t gone without __________.

    A.I             B.me            C.myself         D.mine

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