2019年mpacc考试英语真题——名词27

{01}The stronger the ________, the more quickly a person will learn a foreign language．
A.motivation
B.situation
C.impression
D.explanation
解析：考查名词词义辨析。句意：一个人学外语的动机越强，那么他就学得越快。motivation动机，刺激；situation形势，情形；impression印象；explanation解释，说明。
本题选A。
{02}Scientists have made a great _________ in the treatment of cancer．
A.principle
B.breakthrough
C.conclusion
D.introduction
解析：
本题选B。