Don’t interrupt me. I letters all morning and have only finished five.A. writeB. have wr

问题补充：

Don’t interrupt me. I letters all morning and have only finished five.

A. write

B. have written

C. have been writing

D. am writing

答案：

A. write

B. have written

(答案→)C. have been writing

D. am writing

解析：考查时态。句意：别打扰我，我一上午都在写信，到现在才写好五封。现在完成时表示从过去某一时间开始的动作一直到现在还在继续。