詞匯測試，用所給單詞的適當(dāng)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.
