题文
—When will his party begin?
—I am not sure. It _ be at 8:00 p.m.
| A．must | B．may | C．have to | D．has to |
—When will his party begin?
—I am not sure. It _ be at 8:00 p.m.
| A．must | B．may | C．have to | D．has to |
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