If his parents are convinced ______ the
题型:选择题
问题:
If his parents are convinced ______ the fact that his son always focuses his mind _______his study.
A.of; on
B.of; at
C.by; to
D.on; at
If his parents are convinced ______ the fact that his son always focuses his mind _______his study.
A.of; on
B.of; at
C.by; to
D.on; at