情态动词的被动语态 — 英语词汇题

Choose the correct answer: In our city, old clothes ______ to make bags so that …

Rewrite the sentence in the passive voice without changing its meaning: The scho…

The robot has already washed the dishes and made the beds. The soil in the flowe…

Scientists are studying a strange light on Mars. It can't be a star because star…

根据句意和首字母补全单词：___ the air on Mars is safe, people will …

英语课上，外教问你："What do you do on the weekend?" 你想说自己�…