问题描述：
英语翻译
4我认为老师一定是在开玩笑 5坐飞机旅行比坐火车贵6他游的比他班上其他任何同学都要快7我比她更了解你8飞机三点起飞9拿出你们的书,我们开始上课10他爸爸带她出去兜风11星期天下午你能参加我们聚会吗?当然,我愿意去12出去散散步怎么样?13你不能跟我们一起去吗?恐怕不行14他不可能在家,因为他昨天动身去上海了15你想来一杯茶吗?16这项工作必须尽快完成17我必须在八点钟钱回家吗?是的,你必须18将来所有学生都必须懂得怎样使用计算机19他一定又去开会了20你不准告诉他这个秘密
问题解答：
我来补答
1.He is riding a bike.
2.He has stepped onto the bus.
3.Our failure or success depends on whether we work hard.
4.I think the teacher must be joking.
5.It is more expensive to travel by air than by train.
6.He swims faster than any other student in his class.
7.I know more about you than she does.
8.The plane takes off at three o’clock.
9.Take your book and let’s begin our class now.
10.His father took her for a ride.
11.-Would you like join us for the party on Sunday afternoon?-Sure,I’d love to.
12.What about having a walk outside?
13.–Can’t you go out with us?-I’m afraid so.
14.He can’t be at home,for he started for Shanghai yesterday.
15.Would you like a cup of tea?
16.The task must be finished as soon as possible.
17.-Do I have to return home before 8?-Yes ,you do.
18.All the students must know how to manipulate a computer in the future.
19.He must be away having a meeting.
20.You are not allowed to tell him about this.Keep it a secret!
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