词汇测试，用所给单词的适当形式填空。

1. The environment __________(pollute) is more and more serious.

2. My elder brother decided to go abroad to continue his ___________(educate).

3. Ladies and ___________(gentle), come this way, I'll show you how to operate the computer.

4. You should wear clothes ________ (suit) for the occasion.

5. She gave him a ________ (play) tap on the arm.