2019年mpacc考试英语真题——连词666

{01}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
解析：
本题选A。

{02}Whoever leaves the room last must make sure________all the windows are shut.
A.that if  
B.whether
C.if  
D.that
解析：
本题选D。