问题描述：
Because of the Russian gas limit to Europe,attempts _______ to use botanical fuel as a source of p
A.have made B.having made C.are being made D.will be making
选什么,还有because of 可以这么接句子吗?
A.have made B.having made C.are being made D.will be making
选什么,还有because of 可以这么接句子吗?
问题解答：
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