Is it a good idea English by using it?A. learnB. to learnC. learningD. learns

问题补充：

Is it a good idea English by using it?

A. learn

B. to learn

C. learning

D. learns

答案：

A. learn

(答案→)B. to learn

C. learning

D. learns

解析：此题是一般疑问句，意思是利用英语是不是学习英语的好办法。考查的是固定句型结构it is+形容词+to do sth表示做某事怎样，故选B。