Scientistsareconvinced
来源:语文精选馆 1.56W
问题详情:
Scientists are convinced _____ the positive effect of laughter _____ physical and mental health.
A.of; on B.by; in C.of; at D.on; at
【回答】
A
知识点:介词
题型:选择题
问题详情:
Scientists are convinced _____ the positive effect of laughter _____ physical and mental health.
A.of; on B.by; in C.of; at D.on; at
【回答】
A
知识点:介词
题型:选择题