It is written clearly in the requirements that all passengers _______ check onto
题型：不详难度：来源：
| It is written clearly in the requirements that all passengers _______ check onto board thirty minutes before the plane takes off． |
答案
| D |
解析
| 四个选项分别表示可以、能、将要和应该，根据题意选D，要求中清晰地写明了，飞机起飞前三十分钟，所有乘客都应该检查后登机。 |
举一反三
| Mr Bush is on time for everything. How____ it be that he was late for the opening ceremony?. |
| If it were not for the fact that he ________ ill ，he would finish it. |
If you________first aid correctly，the old man would be saved.| A．offered | B．do | C．know | D．give |
|
---Tom, _____we go home together this afternoon ?
---Ok !| A．shall | B．must | C．would | D．need |
|
You _____ return my dictionary now. You can keep it and I will get it from you later.| A．may not | B．mustn’t | C．can’t | D．needn’t |
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