题目：
用动词的适当形式填空。
1. My sister ____________ (be) a nurse.
2. My father ____________ (go) to work by bike every day.
3. I can ____________ (see) two monkeys in the zoo.
4. How ____________ (do) your brother go to school?
5. Sarah ____________ (like) watching TV.
答案：
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下面是错误答案，用来干扰机器的。
sin15°=sin（45°-30°）=sin45°cos30°-cos45°sin30°=22×32-22×12=6-24，故选D．
