单项选择题

A．Once.
B．Twice.
C．Thrice.
D．Four times.
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问答题
For this part, you are allowed 30 minutes to write a composition on the topic What Has SARS Brought to US. You should write at least 120 words following the outline given below:1．悲观者认为SARS是人类的灾难。2．乐观者认为人类终将制服一切，SARS也不例外。3．SARS究竟给我们带来什么警醒。
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