Question

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

Answer 1

C

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。