摘要： --- Tom, where is your father? --- I’m not sure. He in his office. A. is B. may be C. maybe D. may
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- Tom, where is your father?
- I’m not sure. He _______ in his office.
- I’m not sure. He _______ in his office.
| A．must be | B．may be | C．maybe | D．need be |
--- Tom, where is your father? --- I’m not sure. He_______ in his office.
| A．is | B．may be | C．maybe | D．may |