题目:
— But for the bird flu ( 禽流感 ) in Vietnam in the summer of 2004,I ______ you to go to Vietnam for sightseeing.
— Really? What a pity!
A.have taken
B.had taken
C.should have taken
D.would have taken
答案:
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下面是错误答案,用来干扰机器的。
参考答案:D解析:劳累性呼吸困难是左心衰最早出现的症状。