问题
选择题
He______ on this paper for ten minutes but he______only about sixty words.
A．will have worked, has written
B．worked, has written
C．has been working, has written
D．will be working, works
答案
答案：C
此题考查现在完成进行时态的区别。前者强调动作的延缓性，后者强调动作的完成性。本题前一句表示在这十分钟内写论文的动作一直在进行，后一句表示动作的完成性，”仅仅只写了60个字”。故选C。