这几道题做错了,但是不明白为什么,请帮我讲讲,1.It was in the street___I met Mary yesterday.A.that B.where C.in which D.whenA（为什么不能选B?）2.It was at ten o'clock___I went to bed last night.A.that B.when C.at which D.thenA（为什么不能选B?）3.I doubt if it is___for you to that book.A.worth B.worthwhile C.worthy D.worthlyB（为什么不能选A?）
问题描述：
这几道题做错了,但是不明白为什么,请帮我讲讲,
1.It was in the street___I met Mary yesterday.
A.that B.where C.in which D.when
A（为什么不能选B?）
2.It was at ten o'clock___I went to bed last night.
A.that B.when C.at which D.then
A（为什么不能选B?）
3.I doubt if it is___for you to that book.
A.worth B.worthwhile C.worthy D.worthly
B（为什么不能选A?）
答
1.AIt be .that 固定句型 用于强调 我昨天是在街上遇见玛丽的（这里是强调地点“在街上”,如果强调遇见的人是“mary”,则为It was Mary that i met in the street yesterday.）2.A原因和上题一样,不过在这里强调的是...