1编号：4559题型：单选题测试正确率：40.95%
Do you have to read?
2编号：2795题型：单选题测试正确率：0%
He has two sons, one is a doctor, _____ is a student.
3编号：2794题型：单选题测试正确率：0%
There are three books on the table. One is here, where are ______?
4编号：2793题型：单选题测试正确率：0%
I have three pens. One is red, ___ are black.
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