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
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
A解析:as if“好像;仿佛”;in case“以防”;while“而”;though“但是”。句意:杰克一句话也不说,而老师却向他微笑,仿佛他做了什么聪明的事。故选A项。