单项选择题

When（）difficult problems, we should often take an optimistic attitude.

A．faced
B．being faced
C．facing
D．having faced

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单项选择题
Hanna is a brave rider, but she rides（）of my colleagues.

A．more bravely
B．the most bravely
C．less bravely
D．the least bravely
单项选择题
The No. 938 bus（）to Beijing, and not to Tianjin.

A．is gone
B．gone
C．goes
D．has gone
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