单选题：Agreat deal has been done to remedy the situation.

题目内容：

Agreat deal has been done to remedy the situation. A．maintain
B．improve
C．assess
D．protect

参考答案：

答案解析：

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Our statistics show that we consume all that we are capable of producing.A．waste

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Which of the following is NOT true of traditional university research?A．It is fr

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