2019年mpacc考试英语真题——连词658

{01}Li Yang, the founder of Crazy English, says that he copies it down _____ he comes to a
beautiful sentence.
A.unless        
B.while    
C.because          
D.every time
解析：
本题选D。

{02}Scientists say it may be five or six years         it is possible to test this medicine on human patients.      

A.since                        
B.after      
C.before                      
D.when
解析：
本题选C。