“二手车买卖合同”是保护二手车交易双方合法权益的重要文件。
参考答案：对
I don't know if I _______ time tomorrow. If I _______ time, I will call you. [ ]
A. have, have
B. will have, will have
C. will have, have
D. have, will have
文艺复兴时期刨立“太阳中心说”的科学家是
A．伽利略
B．哥白尼
C．布鲁诺
D．开普勒
