1 . Mr. Smith had stayed in many parts of the world, and he finally settled ______in Canada in the 1990s. (用适当的词填空)

2 . We are trying to raise public awareness of environmental protection, ________(particular) air pollution. （所给词的适当形式填空）

3 . Let me tell you ________(brief) what happened. (所给词的适当形式填空)

4 . We will not discuss this until later ________.

5 . Mary offered the money to me. ________ I couldn’t have afforded the ticket. (用适当的词填空)

6 . Her family was ______ (extreme) poor and all she had was one pair of shoes. （用单词适当形式填空）