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【单选题】

The girl sat there quite silent and still with her eyes ____ on the wall.

A.
fixing
B.
fixed
C.
to be fixing
D.
to be fixed
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参考解析:
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举一反三

【单选题】Not until____________the exam _________ the importance of doing homework.

A.
had he failed; he realized
B.
he had failed; did he realize
C.
he had failed; he realized
D.
had he failed; did he realize