Joe had many regrets when he __________ the years he spent abroad.

A． looked back on

B． looked down upon

C． looked up to

D． looked out of

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参考答案

1 Many scientists __________their own eyes and ears than the theories of the ancients.

A． would rather to believe

B． would rather believe

C． rather would believe

D． will rather believe

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2 __________ from his expression, he is in low spirits.

A． Judged

B． Judging

C． Being judged

D． Having judged

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3 It __________our teacher came that we began the examination.

A． was until

B． is until

C． was not until

D． is not until

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