①The boy (take) to hospital at once after he fell off the tree.
②It's hard to give up (smoke), but you have to.
③ Would you mind (close)the window? It's raining outside.
④ Tom stopped (play) with Bob when Bob came to visit him.
⑤I (stay) at home and sleep all day if there is no class tomorrow.
⑥John (chat) with his son while his wife was cooking in the kitchen.
⑦ I don't think students should (allow) to go out on school nights.
⑧Yesterday was the (hot) day of the year.
⑨The policeman said that he (see) a Young Pioneer help an old woman cross the road the day before.
⑩You (keep) the book for two weeks, and you'give丿d better return it to the library now.