题目内容：
回答(65)题
A．if B．while
C．because
D．although
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答案解析：
单选题：回答(65)题
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B．while
C．because
D．although
B．while
C．because
D．although
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回答(55)题 A．noise B．sounD C．musiC D．bell
Which country is the biggest consumer of petroleum?
Which country is the biggest consumer of petroleum?A．The United States. B．Russia
During the Great Depression, many poor families in Oklahoma
During the Great Depression, many poor families in Oklahoma lost their farms be
回答（64）题
回答（64）题 A．rivers B．oceans C．forests D．mountions