Ⅰ.单句语法填空:(每题1分，共10分）
1.You must read the _________ (instruct) before taking the medicine.
2.When he came back three hours later, they were still sitting on the sofa, ________ (absorb) in conversation.
3.Children, when_________ (expose) to an Englishspeaking atmosphere, will pick up the language much more easily.
4.This job doesn't pay well, but it'll _________ (rough) cover your daily expenses.
5.Will it be convenient ________ you to chat with me on the Internet tonight?
6.We should not overlook this possibility _____ we can't arrive on time because of the weather.
7.___________ (lack) such experience will constantly trouble you in your business.
8.It is more complicated than we _____________ (previous) thought.
9.When not in a room, you'd better switch________all the lights and the fan.
10.Jennifer is having a hard time getting accustomed to new __________ (surround) in Australia.
