Some students think that watching TV ___of great help.A.be B.is C.are D./

问题描述:

Some students think that watching TV ___of great help.A.be B.is C.are D./

答案:B
动词ing短语作主语,谓语动词用单数形式.句子原意是什么有些学生认为看电视很有帮助。为什么可以加of...?of + 名词 = 形容词,比如:of great importance = very important。如果没有其他问题了,请记得采纳,谢谢!