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。I can’t tell you d___________ when I will come.
I offered the a______________ suggestions of spending the vacation in the mountains or by the sea..
Many stores have a delivery service for the c____________ of customers.
Lewis and Clark ___________ （勘查）the territory from St Louis to the Pacific.
The young bird s_________ its wings.
vHe ____________(惊慌) thinking it was a shark..
The whole office ______________ (换了)to a new computer system last year.
He is engaged in ________________(农业).
Casey founded a company to e_____________ the mineral resources in the area.
He didn’t like his daughter’s boyfriend and _______________(禁止) him the house.