问题
选择题
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
答案
答案：D
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。
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