What ______ he do on his last school trip? [ ]
A. does
B. did
C. is
D. was
B
商业银行应采取（）履行尽职调查，形成书面报告，并对其内容的真实性、完整性和有效性负责。
A.现场形式
B.现场与非现场相结合的形式
C.非现场形式
D.现场与非现场任选
稚阴稚阳
