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【单选题】

After hearing the bad news, Susan found herselfof it from time to time while at work.

A.
to think
B.
thinking
C.
though
D.
having thought
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参考解析:
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举一反三

【单选题】I wondered what great difficulty he had ________ the plan.

A.
to carry out
B.
carrying out
C.
carried out
D.
with carrying out