一、_____it rain tomorrow,we would have to put off the visit to Mount Tai.
问题描述：
一、_____it rain tomorrow,we would have to put off the visit to Mount Tai.
A、 were
B、 should
C、 would
二、If it were not for the fact that she_____sing,I would invite her to the party
A、Couldn't
B、shouldn't
C、can't
三、What would have happened____,as____far______as the river bank?
A、Bob had walked farther
B、if should walk farther
C、had Bob walked farther
以上三题请给出正确选项,并说明原因,
（另,因我目前分数只有8分了,汗一个.我后面再追加分数吧）
答
1.B 从后面看,有tomorrow,说明是要对将来的虚拟,所以用should.were是对现在的虚拟,而had done 是对过去的虚拟 2.c前面的were 表明了是对现在的虚拟,根据句子意思,选填的应该是“能够”,现在,所以选c 3.c与前面的would have done对应