she is the most beautiful girl who takes part in the meeting
a.that b.who c.which d.whom(who和whom有什么区别啊?）
who 是关系代词代主语和宾语,而whom是关系代词代宾语.
we will have a four-day holiday next week
a.a four-days b.four-days c.a four-day d.a four days
my old grandmother always forgets something you can't expect her to do it for you
a.show to do b.expect to do c.suggest do d.make to do