1．Since then, many scientists have thought that our actions do make a __________ (differ)．
[答案] difference
2．He hopes that his business will grow __________ (steady)．
[答案] steadily
3．The dark cloud above one of the world's toughest criminal neighbourhoods __________ (simple) disappeared for a few days.
[答案] simply
4．If you come to visit China, you will experience a culture of amazing depth and __________ (vary)．
[答案] variety
5．If you have your lecture notes or the article in hand, you and the professor will be able to examine specific points that are __________ (confuse) to you.
[答案] confusing
6．If there is a delay in take－off, the captain will make an __________ (announce) at once.
[答案] announcement
7．In __________ (add), many students also attened the opening ceremony.
[答案] addition
8．__________ (compare) the prices in this market with those of that market, we could decide which to go to.
[答案] Comparing
