1.The police warn: Don't release personal information to strangers.
2.It's illegal to use somebody's image in commercial advertisements without permission.
3.Various ceromonies were held to celebrate the sixtieth anniversary of the conclusion of the second World War.
4.In daily life, we'b better not make friends with those who always fail to keep faith.
5.The teacher encouraged us to try to think of as many methods as we could to solve the math problem.
6.If you have the intetion of studying abroad, you'd better do some preparations for that.
7.A spoiled child find it very difficult to get along with other children.
8.Everyone should be well aware that when you get something,you will lose something.
9.Twenty years ago, nearly nobody expected that every family in Shanghai could have an apartment/a flat.
10.The teacher said that he didn't believe those private hospitals which claim to cure all kinds of diseases.
11.He gradually knows the principle that only those which are suitable are best.
12.He has a bad memory, and always needs to be reminded.
He is forgetful, and always needs to be reminded.
13.As we all know, the right of being and health of every citizen should be protected by laws.
14.In the past ten years, an old man in Tianjin staked/imbursed poor students by riding a tricycle.
15.I think we should owe the success of recent years' in China to the leaders/torchbearers.
16.Scientists have been searching a new enegy source to replace oil.
参考资料:手工打天下!