有可能多选
问题描述：
有可能多选
I _____ received a letter from him yesterday.
A.不填
B.have
C.was
并说明为什么,
答
选 A
因为,
have received 是现在完成时,不能和yesterday连用.
was received 是被动语态,不合题意.
选 A 时,received是一般过去时,正好和yesterday 连用.