1 . Joe is proud and stubborn, never admitting he is wrong and always says someone else is ________ (blame) for the mistake. (所给词的适当形式填空)

2 . I don’t know what to do to persuade them ________ (change) their mind and develop a good relationship with them. (所给词的适当形式填空)

3 . 如果我们尽力回收废物，我们可以减少污染，保护自然资源。
If we try our best to____________the wastes, we can reduce pollution and conserve natural____________.

5 . 学生们轮流去清理他们的教室。
The students took turns to________ ________their classroom.

6 . 这个学生因为所犯的的错误除了向她的老师道歉之外别无选择.
The student had no other choice but to ________ to her teacher _______ the mistakes she had made.

7 . 他们用了大约一个月的时间才弄明白如何启动这台设备。
It took them about one month to ________ _________ how to start the equipment.

9 . 要参加人民解放军，男子必修剃掉胡子。
To join the People’s Liberation Army, it’s required for men to _________ _________ their beards.