题目内容：

阅读下面句子，根据首字母或汉语提示用单词的适当形式填空。

1.I can’t tell you d___________ when I will come.

2.I offered the a______________ suggestions of spending the vacation in the mountains or by the sea..

3.Many stores have a delivery service for the c____________ of customers.

4.Lewis and Clark ___________ （勘查）the territory from St Louis to the Pacific.

5.The young bird s_________ its wings.

6.vHe ____________(惊慌) thinking it was a shark..

7.The whole office ______________ (换了)to a new computer system last year.

8.He is engaged in ________________(农业).

9.Casey founded a company to e_____________ the mineral resources in the area.

10.He didn’t like his daughter’s boyfriend and _______________(禁止) him the house.