—Is Nancy knocking at the door?—No, it ________ be Nancy. She has gone to Guangz
题型：不详难度：来源：
—Is Nancy knocking at the door?
—No, it ________ be Nancy. She has gone to Guangzhou.
A. can’t B. mustn’t C. won’t |
答案
| A |
解析
| 考查情态动词。根据语境：——是南希敲门么？——不，不可能是南希。她已经去广州了。故选A。 |
举一反三
| You _______ see a dentist when you have a toothache. |
---Must I do the work today?
---No, you _______. You may do it tomorrow.| A．can’t | B．mustn’t | C．shouldn’t | D．needn’t |
|
–Look at that girl! Is it Susan?
--No, it _______ be her. She has gone back to her hometown.| A．mustn’t | B．can’t | C．needn’t | D．wouldn’t |
|
The red bike _______be Hu’s. She has a blue bike.| A．must | B．might | C．can | D．can’t |
|
Trees ____ fight air pollution．They are natural air conditioners．| A．should | B．must | C．need | D．can |
|
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