--- When did Lily’s brother finally stop drinking alcohol?---It was in May ______ he was put into prison for drunk driving.
The two girls are so alike that strangers find_____ difficult to tell one from the other.
(2011重庆卷,27﹚——Silly me! I forget what my luggage looks like. ——What do you think of over there?
(2011天津卷,1﹚We feel our duty to make our country a better place.
We have various summer camps for your holidays. You can choose ____ based on your own interests.
The two girls are so alike that strangers find ________ difficult to tell one from the other.