A.messB.inB.inHis room is ().……

单项选择题When data() , it has to be analyzed to decide what it all means.

单项选择题In my opinion, the first thing ()is what tools we should use.

单项选择题This is one of the main ways ()a business learns what customers want.

单项选择题Our advertising rates are()size and location.

单项选择题Sometimes it（）over half the total time spent on a research problem.？（）

A.takes up
B.takes off
C.takes on