_____ China’s reform and opening up in late 1978, its quick development has aroused worldwide attention, which has made America anxious about it.
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.