1。在会议期间，所有的手机必须关闭。
All mobile phones must __ __ __ __ the meeting.
2.他的成功是以辛勤工作为基础的。
His __ __ __ __ his hard work.
3.收音机里说，过会儿雨会停的。
The radio says it may __ __ __ __.
4.要确保把所有的垃圾都扔到垃圾桶里。
__ __ that all of the rubbish __ __ the dustbin.
拜托各位了哈！
參考答案:1。在会议期间，所有的手机必须关闭。
All mobile phones must __ __ __ __ the meeting.
be shut off in
2.他的成功是以辛勤工作为基础的。
His __ __ __ __ his hard work.
sucess is based on
3.收音机里说，过会儿雨会停的。
The radio says it may __ __ __ __.
stop raining right away
4.要确保把所有的垃圾都扔到垃圾桶里。
__ __ that all of the rubbish __ __ the dustbin.
Make sure ... threw into(这里是不是少了一横线了，最好可以用被动态加一个are）
