Some students think that English songs helps to improve their English a lot.A. singingB.

问题补充：

Some students think that English songs helps to improve their English a lot.

A. singing

B. sang

C. sing

D. sings

答案：

(答案→)A. singing

B. sang

C. sing

D. sings

解析：此句的含义是很多学生认为唱英语歌曲可以帮助提高英语。其中考查的内容是动名词短语作主语。动名词是动词的非谓语形式之一，可以充当句子的很多句子成分。作主语时谓语动词要用单数形式，故选A。