16.With tears on her face, the old lady watched the little boy _______ to a hospital.

A.send B. to be sent

C. being sent D. sending

17.______ the book again, she discovered that she had missed a lot in her first reading.

A.While reading B. When read

C. As reading D. In reading

18.Your experiment reports must be checked with care before ________.

A.handed them in B. them handing in

C. being handed in D. handing them in

19.Mr. and Mrs. Smith didn’t expect the house ______ so well.

A.to be decorated B. to decorate

C. be decorated D. decorating

20.She was sitting in an armchair ______ a book.

A.reading B. to read

C. to be reading D. to have read

答案：16-20 CACAA

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