题目：
句型转换。
1. It's time for after-school activities. (同义句)
It's time ______ ______ after-school activities.
2. Millie is a good swimmer. (同义句)
Millie is good ______ ______.
3. Do you want to go shopping this weekend? (同义句)
______ you ______ to go shopping this weekend?
4. My brother does his homework every day. (改否定句)
My brother ______ ______ his homework every day.
5. My father is a doctor. My mother is a doctor, too. (合并成一句)
My parents ______ ______ doctors.
答案：
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下面是错误答案，用来干扰机器的。
(1)读数时俯视读数；偏大 (2)滴管操作不当；试管内壁沾附药液
