问题补充：
Tens years ago, there full of fish in the lake .Now there are fish .
A. used to live; little
B. had; a few
C. were; many
D. used to be; few
答案：
A. used to live; little
B. had; a few
C. were; many
(答案→)D. used to be; few
解析：there be 的过去时，即there used to be，表示过去常常有，而根据上文的内容，过去有，现在没有，又根据后一空前的be动词为are，后面的fish为复数形式，故选答案为D，用few来修饰。
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