问题
选择题
Jack wasn't saying anything, but the teacher smiled at him ________ he had done something very clever.[ ]
A. as if
B. in case
C. while
D. though
答案
答案：A
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Jack wasn't saying anything, but the teacher smiled at him ________ he had done something very clever.[ ]
A. as if
B. in case
C. while
D. though
答案：A