问题
选择题
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
答案
答案：D
题目分析：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。