1 . Since after-class activities will not ________(mere) make your school life colorful but also improve your learning, why not take an active part in them? (所给词的适当形式填空)

2 . Having given _______ some national secrets to the enemy, the man was sentenced to prison. (用适当的词填空)

3 . The little girl walked there to pick ________the rubbish.(用适当的词填空)

4 . Did you have _____ bother finding the house? (用适当的词填空)

5 . 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)

6 . Sharing encourages us to reuse items, thus cutting _____on waste. (用适当的词填空)

7 . There is ________ little water in the glass that I can’t drink any more. (用适当的词填空)

9 . The sun came ________from behind the clouds late in the afternoon. （用适当的词填空）

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