问题补充:
Don’t disturb me. I letters all the morning and have written ten so far.
A. write
B. was writing
C. have written
D. have been writing
答案:
A. write
B. was writing
C. have written
D. have been writing
解析:考查时态。本题的关键词是时间状语all the time一直。该时间状语通常与现在完成进行时连用。句意:不要烦我,我一直在写信,到目前为止已经写了10封了。现在完成进行时表示一直在做某事,强调动作的持续性和反复性。故D正确。