yesterday the meeting____,because she had to____her mother's.

问题描述:

yesterday the meeting____,because she had to____her mother's.
a.was called for ,call up b.was delayed ,call in
c.was put off,call on d.was called off,call at

答案D,第2空为拜访她妈妈家
拜访 call on sb
call at some place
题目是拜访her mother's,是指她妈妈家,为地方,用call at
如果是题目是her mother,则用call on