the phone functions get it doesn’t make much sense to those using it mostly for calling.

问题补充：

the phone functions get, it doesn’t make much sense to those using it mostly for calling.

A. Various if

B. Various as

C. So various

D. More various

答案：

A. Various if

(答案→)B. Various as

C. So various

D. More various

解析：句意：尽管手机的功能各种各样，但是它对于那些用手机只打电话的人来说没什么意义。as 意为尽管，要倒装，形容词前提。所以选B。