单项选择题

The new drug will not be put on the market（）it has proved safe on humans．

A．if
B．until
C．since
D．when

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单项选择题
According to the time table，the train for Beijing（）at 9:10 p.m. from Monday to Friday．

A．was leaving
B．is leaving
C．leaves
D．has 1eft
单项选择题
Our company's visitors decided to stay in our city for（）two days as they wanted to have a look around．

A．other
B．the other
C．another
D．other's
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