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33.(  ) The maths problems are very difficult to ________.

A. try out           B. try on        C. work out         D. work on

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32.(  ) If you don’t protect our environment, our future will be _______.

A. helpful       B. hopeful       C. helpless          D. hopeless

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31.(  ) Surfing is a very popular ____in Australia.

   A. games     B. sports       C. match         D. sport

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30.(  ) I have _______uncle who works at _______ university.

A. a, an         B. an, an        C. an, a             D. a, a

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29.(  ) What ______ the population of China ?

A. is           B. are              C. has              D. have

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28.(  ) -- Would you like to see the film Superman with me?   -- ______. 

A. That’s all right  B. No, I don’t     C. Yes, I do          D. Yes, I’d love to

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27.(  ) The Art Festival ______ in our town every year.

A. holds        B. is held       C. is holding       D. was held

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26.(  ) -- ______ did you spend your winter vacation?   -- In England.

A. Where        B. What       C. Which          D. Why

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25.(  ) Bob and Ann ______ to Singapore . They’ll return in a month .

A. have gone     B. has gone      C. has been       D. have been

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24.(  ) I like music ______ is quiet and gentle .

A. when        B. who      C. that            D. what

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