单项选择题

When a psychologist does a general experiment about the human mind , he selects people and asks them questions ______.

A. at length
B. at random
C. in essence
D. in bulk
<上一题 目录 下一题>
热门 试题

单项选择题
By the end of the month all but two people ______.
A. have left
B. will leave
C. will be leaving
D. will have left
单项选择题
We will visit the Great Wall ______ the weather remains sunny.
A. provide
B. is provided by
C. providing
D. to provide
相关试题