when is a good time ___ the song? A.sing B.to sing C.singing D.sa_英语解答

when is a good time ___ the song? A.sing B.to sing C.singing D.sang

人气：398 ℃　时间：2019-09-13 20:54:38

解答

答案：B
动词不定式作后置定语,修饰前面的名词time.