Ten minutes has been made full of the problem.A. using ; studyingB. use ; to studyC. to

问题补充：

Ten minutes has been made full of the problem.

A. using ; studying

B. use ; to study

C. to use ; to study

D. use ; studying

答案：

A. using ; studying

(答案→)B. use ; to study

C. to use ; to study

D. use ; studying

解析：考查句子结构。本题是一个被动语态，主动形式是make use of ten minutes.变成了被动语态Ten minutes has been made use of.后面的不定式表示目的状语。句意：为了了解这个问题，10分钟的时间已经被充分利用了。故B正确。