He appears a long time. He is impatient for my arrival.
A. to wait
B. to be waiting
C. to have waited
D. to have been waiting
网友回答
A. to wait
B. to be waiting
C. to have waited
(答案→)D. to have been waiting
解析：此题考查非谓语动词的时态。该句中wait动作从过去到现在一直都在延续，并没有停止，故选D。