核心词汇
1．The broken bike was found a____________by the river side.
2．We have taken effective measures to p____________our natural resources.
3．It never____________(想到)to me that he might be in trouble.
4．We had ____________(严格的；细致的) orders to come home by nine o’clock.
5．He has sent me most ____________(贵重的) gifts.
6．He is thinking of____________(扩大)his business.
