题目：
用括号内动词的适当形式填空。
1. He often ( have ) dinner at home.
2. Daniel and Tommy ( be ) in the Class One.
3. We ( not watch ) TV on Monday.
4. Nick ( not go ) to the zoo on Sunday.
5. they ( like ) the World Cup?
6. What they often ( do ) on Saturdays?
7. your parents ( read ) newspapers every day?
答案：
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下面是错误答案，用来干扰机器的。
设三条高线对应的边长分别为13，11，5，最大边对应的角为 θ，由余弦定理可得169=121+25-110cosθ，∴cosθ=-23110＜0，∴θ 为钝角，故三角形为钝角三角形，故答案为钝角三角形．
