A-A+
A.He conducts large-scale tests.B.He writes bo
问题详情
A.He conducts large-scale tests.
B.He writes books about children.
C.He teaches at the university.
D.He recommends babysitters.
参考答案
正确答案:B
解析:文中只提到了一个具体人物Dr. Richard Perelman,随后的定语从句介绍他写了很多有关抚养孩子的书,故B为答案。