1.
He wrote more than30 books and must have earned a bomb.
他写了30多本书，一定挣了一大笔钱。
2.
That dress must have cost (her) a bomb!
那连衣裙一定花了（她）很多钱!
3.
I must repaint them before they go rusty-a stitch in time save nine.
我必须重新油漆一下，免得生锈——及时处理，事半功倍。
4.
In the event that a boiler does shut down the stop-check must prevent backflow into the boiler, the weight of the disc and dash pot piston, through the force of gravity, promote rapid sealing so steam and condensate cannot backflow into the boiler ev
如果锅炉没有关闭截止止回阀，则必须防止回流到锅炉上，阀瓣压铁和缓冲活塞，在重力的作用下，能够迅速实现密封，使得蒸汽和冷凝水即使在低压下也不会回流到锅炉里。
5.
Every student who wants to get a certificate must pass the exam.
1每一个想获得证书的同学都必须通过这个考试。
6.
The noise of your radio must be limited to a level that we can all bear.
你收音机的音量必须控制在我们大家都以忍受的范围内。
7.
A weapon with a special ability must have at least a +1 enhancement bonus.
有特殊能力的武器必须至少有+1增强加值。
8.
Note that a C++ default constructor must not contain any code that can leave.
类构造函数不应该含有任何代码，因为它支持“离开”。
9.
Before a name (identifier) can be used in a C++ program, it must be declared.
（当一个名字（标识符）能够在一个C++程序中使用之前，必须先声明这个名字。
10.
AA:THIS L/C NO. AND DATE MUST APPEAR IN ALL SHIPPING DOCUMENTS.
此份L/C号码与日期必须显示在所有的海运文件中（海运文件是指哪些？发票+箱单+提单+产地证么？）
词汇听力：
小测验：选择正确的单词