动词不定式语法选择题.关于主动表被动的、

动词不定式语法选择题.关于主动表被动的、
——Did the judge ask you many questions?
——Yes,and___.
a,they were difficult to be answered
b,to answer them was to be difficult
c,they were difficult to answer
d,they had difficulty in answering
答案是c,为什么不用a 问题不是被回答的吗?如果是主动表被动,想问一下什么时候用主动表被动.（最好说通俗点,不要说一大串专业的什么）