摘要：-Mary, have you finished your English homework? -No. In fact, I . A. have just started C. just started C. am just starting D. have just been starting
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--Mary, have you got my email? I sent you a birthday card yesterday.
---Oh, really! I haven't ＿＿＿my mailbox yet.
A．seen B．checked C．received D．answered
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--Mary, have you got my email? I sent you a birthday card yesterday.
---Oh, really! I haven't ＿＿＿my mailbox yet.
| A．seen | B．checked | C．received | D．answered |
—Where _____ Mary have put the empty bottles?
— She _____ them away. They must be somewhere.
| A．can; can’t have thrown | B．must; needn’t |
| C．must; must have thrown | D．can; mustn’t have thrown |