【推荐1】We’ve got to remember this group wants to look at how the Internet is being _________ (use) in the classroom. （所给词的适当形式填空）

【推荐2】We’d better hurry up and get _________ (change). The opening ceremony is starting soon.

【推荐3】I’d like to invite you to visit the paper-cutting exhibition ____________(hold) by our school next Sunday. (所给词的适当形式填空)

【推荐1】It is requested that all the passengers’ luggage ________ (check) before it is carried into planes. (所给词的适当形式填空)

【推荐2】It is demanded that all stores __________ not sell cigarettes to anyone under 18. (用适当的词填空)

【推荐3】完成句子，用所给单词的正确形式填空。
1. It is required in the library regulations that any book borrowed __________ (return) by due time, or the borrower will be fined.
2. Without doubt taking physical exercise regularly is an effective way to avoid ___________ (infect) with the flu.
3. If you ______________ (not mention) this matter to me again yesterday, I would certainly have forgotten it.
4. The famous professor __________ (refer) to in your conversation just now would come to the urgent conference.
5. With a lot of difficult problems __________ (settle), the manager felt like a cat on hot bricks.