Word combinations are: reopen, Chongqing, reopen, reopen, repeat, repeat the same mistakes, overlap, Rocky Mountains, and many difficulties.

Sentence: 1, you must think it over and don't make the same mistake again. Life has several decades, so I can't afford to wait.

Chongqing is a city worth visiting. We must go and see it sometime.

② Chinese characters that worship can be written as "worms".

The group words are: insects, pests, beneficial insects, moths, flying insects, aphids, larvae, ladybugs, and worm teeth.

1, be sure to brush your teeth on time every day for more than three minutes to effectively avoid aphids and tooth decay.

2. Ladybugs are rarely seen now.