A
1. You had better ____________ ( not laugh ) at others because everybody makes mistakes.
2. All the rules must ___________ (explain) to the players clearly before the game starts.
3.---- It seems that you know a lot about the story.
---- Well. We _____________ (read) it many times.
4. It is said that he devoted much of his time to _____________ (write) his new novel.
5. Boys and girls, please read the guidebook carefully, or you ________ (get) lost during the visit.
6. Fifty students have entered the writing competition since it __________(hold) for the first time.
7.He promised us that she ____________ (tell) him about the event at the proper time, but actually(事实上) she didn’t.
8. Before our teacher reminded us, we ______________ (send) the e-mails.
