2019年mpa考试英语真题——介词和介词短语2170

{01}He wasdismissed from school because of  the rule that alcohol is banned from all buildings. A.he violated B.he violating C.his violated D.his violating 解析：考查非谓语动词。because of因为，of为介词，后接V-ing，前用所有格，故选D。
本题选D。
{02}Scientists are convinced _____the positive effect of laughter _____physical and mental health． A.of ;at B.by; in C.of ; on D.on ;at 解析：考查介词。be convinced of相信，名词effect后接on，故选C。
本题选C。