The number of the students in our class to 54.A. picks upB. adds upC. takes upD. turns up

问题补充：

The number of the students in our class to 54.

A. picks up

B. adds up

C. takes up

D. turns up

答案：

A. picks up

(答案→)B. adds up

C. takes up

D. turns up

解析：短语辨析。A捡起，用车接；无意中学会；恢复；B加起来；共计；C占据，从事于，开始做；D出现，调高；句意：在我们班级里的学生的数量共计达54.故B正确。