题文
—Can Professor Li be in the laboratory?
—He ______ be； I saw him there half an hour ago.
| A．can | B．must |
| C．might | D．need |
推荐试卷
—Can Professor Li be in the laboratory?
—He ______ be； I saw him there half an hour ago.
| A．can | B．must |
| C．might | D．need |
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