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【单选题】
（2010·长春模拟) she is not so cheerful she used to be?
A.
How is it that；as
B.
Why is it that；what
C.
Is it why；that
D.
How it is that；as
题目标签：长春
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】(2013·吉林长春高中毕业班第一次调研)As the immune system weakens, it loses the ability ________ illnesses.
A.
fighting
B.
fought
C.
to fight
D.
to be fought
