2019年mpacc考试英语真题——连词700

{01}As is known, ________we know some basic knowledge concerning AIDS, we can protect
ourselves from being infected.
[      ]
A.as far as  
B.if only
C.so long as  
D.unless
解析：
本题选C。

{02}That was really a splendid evening. It"s years ___ I enjoyed myself so much.
[      ]
A.when    
B.that    
C.before    
D.since  
解析：
本题选D。