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20.The prices of houses, ________ is often reported, have been going up sharply in the past few months.

A.which        B.it            C.as          D.what

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19.The city government is planning to build a factory to deal with the industry waste, but when and where to build it _______.

A.haven’t been decided             B.aren’t decided

C.hadn’t been decided              D.hasn’t been decided

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18.-Look! I’m getting fatter and fatter. What can I do?

   -________. Do more exercise and you will be all right.

    A.Slow it down   B.Don’t worry   C.That’s right     D.Don’t mention it.

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17.-Jack, don’t just repeat what _____ teacher of our class has told us. Try to express yourself in your own words.

 -OK. Er…, could I have _____ discussion with my classmates first?

A.the, the       B.a, a          C.a, the         D.the, a

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16.Wang Lin failed to be admitted by Hong Kong University last year, and only then _________ the importance of English.

A.he finally realized                 B.he had realized

C.had he realized                  D.did he realize

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15.Strangely, the two men look _____ alike that nearly all the people think they are twin brothers.

A.too much      B.such much     C.much too      D.so much

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14.Professor Backman took up scientific research for decades, and this is ______ he devoted all his life to.

A.which         B.what         C.where         D.how

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