2019年mpacc考试英语真题——连词689

{01}Some parents don"t allow their children to go online ________they are affected by something unhealthy.
A.for fear that  
B.unless
C.in only  
D.in case
解析：
本题选D。

{02}It was some time________we realised the truth.
A.when  
B.until
C.since  
D.before
解析：
本题选D。