1 . ---What does the sign over there read?
---“No person ______ smoke or carry alighted cigar or pipe in this area.

2 . The guard warned, ＂You ________ pay more attention to your behavior next time, young man.＂

3 . —To work in the deep water is dangerous. What should we do?
—________the robots have a try?

4 . According to a newly released regulation on online video services, no one ______generate, release or spread fake news or information by using such technologies. (用适当的词填空)

5 . 用适当的情态动词填空
①These flowers have died. You ___________ have watered them.
②___________ you tell me what time it is, please?
③Henry ___________ walk when he was one year old.
④We are going for a walk. ___________ you like to join us?
⑤___________ she be ten years old next month?
⑥The road is wet. It ___________ have rained last night.
⑦He was waited outside for half an hour. ___________ he come in?
⑧I ___________ have hurt your feelings but it was not my intention.
⑨—What ___________ it be?
—It can’t be a desk, for it is moving. It must be a car.