i`m sorry to keep you_____.you know,i`ve_____for about two hours 1.waiting,waiting

题目

i`m sorry to keep you_____.you know,i`ve_____for about two hours 1.waiting,waiting
2.waited,waited 3.waited,waiting 4.waiting,waited

答案

选 4 waiting ,waited
第一个空 keep waiting
第二个空 是现在完成时,have waited