问题补充:
One of the students good at piano.
A. are, playing the
B. is, play the
C. are, playing
D. is, playing the
答案:
A. are, playing the
B. is, play the
C. are, playing
(答案→)D. is, playing the
解析:句意:一名学生擅长弹钢琴。第一空One of the students作主语,表示一名学生,故谓语用单数形式is。第二空be good at+doing sth. 擅长做某事,play the piano 弹钢琴, 乐器前加定冠词the,故选D。