--- Is that man Mr. Smith?
--- It ______ be him. He has gone to NewYork on business.
| A．may not | B．needn’t |
| C．can’t | D．mustn’t |
--- Is that man Mr. Smith?
--- It ______ be him. He has gone to NewYork on business.
| A．may not | B．needn’t |
| C．can’t | D．mustn’t |
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