— Can I speak to Mr. Smith?
— Sorry, sir. He isn’t in. You leave a message or call him later.
| A．may | B．must |
| C．need | D．should |
— Can I speak to Mr. Smith?
— Sorry, sir. He isn’t in. You leave a message or call him later.
| A．may | B．must |
| C．need | D．should |
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