Some people are good at voices on the phone while others .
A. knowing; aren’t
B. recognizing; don’t
C. knowing; don’t
D. recognizing; aren’t
网友回答
A. knowing; aren’t
B. recognizing; don’t
C. knowing; don’t
(答案→)D. recognizing; aren’t
解析：考查动词。句中recognize voices表示识别声音。后面aren’t补全应当为aren’t good at recognizing voices on the phone。句意：一些人擅长识别电话里的声音，而另外一些人不擅长。故D正确。