1编号：3950题型：单选题测试正确率：43.3%
已知非零实数a，b满足，则等于（ ）．
2编号：3949题型：单选题测试正确率：39.78%
化简：的结果是（ ）
3编号：3885题型：单选题测试正确率：48.14%
The weather in summer in Beijing is cooler than ________ in Shanghai.
4编号：3883题型：单选题测试正确率：58.48%
He began to teach________ English last year.
5编号：3881题型：单选题测试正确率：80.27%
— How did your uncle learn to play the guitar? — By _____.
6编号：3880题型：单选题测试正确率：74.9%
_____of the two story books are very interesting, so I can’t decide which one to choose.
7编号：3879题型：单选题测试正确率：69.27%
Is there _______with your bike?
8编号：3878题型：单选题测试正确率：50.57%
Please send _______ best wishes to Mary.
9编号：3876题型：单选题测试正确率：86.23%
— Is this your key, Jenny? — No, ______ is in my handbag.
10编号：3875题型：单选题测试正确率：65.07%
— Excuse me, are these _____ new shoes? — No, they aren’t. _____ are black over there.
提醒:
，则
等于（ ）．
的结果是（ ）