You can not see the doctor（） you have made an appointment with him.（1 分）

单选题

You can not see the doctor（） you have made an appointment with him.（1 分）

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单选题

---Excuse me. Can‘t you see the sign over there? We are not ____ to smoke on campus.--- I‘m terribly sorry. I didn‘t know it.

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单选题

______on the top of the tower, and you can see the whole city.

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单选题

Make sure that you can see the oil level through the sight gauge.

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单选题

You are about to cross a narrow channel when you see an approaching vessel that can only be navigated safely within the channel. You should ____ .A. cross the channel as you are the stand-on vesselB. cross only if the vessel in the channel is approaching on your port sideC. not cross the channel if you might impede the other vesselD. sound the danger signal

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