问题补充:
Try to sing more English songs,and you will find it interesting a foreign language.
A. learing
B. learns
C. to learn
D. learned
答案:
A. learing
B. learns
(答案→)C. to learn
D. learned
解析:句意:尽量多唱英文歌,你会发现学外语很有趣。这里的it是做形式宾语,真正的宾语是后面的to learn a foreign language这是一个固定的语法形式。而it is…是在it做形式主语的固定句型。所以说,当it做形式宾语时后面不要is,做形式主语时加is(做be动词用)。故选C