问题描述：
23.I was worried about him all the time,but at last I got the letter I long .A.had;been expe
23.I was worried about him all the time,but at last I got the letter I
long .
A.had;been expecting B.were;expecting
C.had;been expected D.have;been expecting
23.I was worried about him all the time,but at last I got the letter I
long .
A.had;been expecting B.were;expecting
C.had;been expected D.have;been expecting
问题解答：
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