1.The teacher as well as the students __________.
A.were challenging B.was exciter
C.were reaxed D.was enjoyable

2.--You are so lucky.
--What do you mean________that?
A.for B.in C.of D.by

3.In some parts of London,missing a bus means______.
A.to wait B.waiting C.wait D.to be waiting


这几题答案是B,D,B
我不明白为什么这么选请讲解一下吧！

1.The teacher as well as the students __________.
A.were challenging B.was excited
C.were reaxed D.was enjoyable
答案是Ｂ．这是主谓一致.主语后接说明主语的修饰语as well as ,with,together with,along with,like,but,except,rather than,in addition to时，谓语应保持同主语一致．
2.--You are so lucky.
--What do you mean________that?
A.for B.in C.of D.by
答案是D.What do you mean by...是固定句型．
3.In some parts of London,missing a bus means______.
A.to wait B.waiting C.wait D.to be waiting
答案是Ｂ．mean to do是＂打算干＂ mean doing是＂意味着＂再说主语用－ing形式，后面应一致