The phrase “back off” means()
A. 后退,放弃
B. 失控
C. 开始责备某人
D. 大声疾呼
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The scientist didn’t think mistakes were opportunities for learning something new()
After the “lovey-dovey” stage passed, the disagreements came()
The word “innocent” means()
A. 天真的
B. 伤心的
C. 妒忌的
D. 单纯的
When was Tsinghua University founded()
A. 1911
B. 1913
C. 1813
D. 1811