What's that outside?I am_____,but I can't______anything unusual.A.hearing;hear B.listening;hear

问题描述:

What's that outside?I am_____,but I can't______anything unusual.A.hearing;hear B.listening;hear
C.hearing;listen D,listening to;hear

答案为B,详细给你解答一下:hear和listen to是vt(及物动词),第一项省略了that,即是,I am listening to(that),单独的listen是vi(不及物动词),所以选择D项.希望可以帮助您.