“养备而动时，则天不能病。”句中“备”的意思是（）。
A、完备
B、详尽
C、周全
D、准备
参考答案：A
用所给单词的适当形式完成下列句子。
1. How many (season) do you know?
2. On a holiday, people (not work).
3. Danny (walk) to school yesterday.
4. We are (put) Christmas things on the tree now.
5. Li Ming teaches (I) to learn Chinese.
经济合同履行原则要求按合同规定的( )履行。
A．标的
B．价款
C．时间
D．地点
