基本信息
例：A computer can only do you have instructed it to do.
A．howB．afterC．whatD．when
答案是C.
21． president is popular because he listens to people.
A．The; theB．The; /C．A; / D．A; the
22．Everybody when the chairman entered the meeting room.
A．Was sting upB．stood upC．has stood upD．sts up
