He wanted to pass the exam and stayed up very late，while this created further problems.A.

He wanted to pass the exam and stayed up very late，while this created further problems.
A. in turn
B. in case
C. in doubt
D. in short

(答案→)A. in turnB. in caseC. in doubtD. in short解析：考查介词短语的辨析。in turn 轮流，反过来，符合句意。in case假使，以防万一；in doubt 不确定，拿不准；in short总之，简言之。

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