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