题目内容
—We're doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.
A. hard B. harder C. hardest D. hardly
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题目内容
—We're doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.
A. hard B. harder C. hardest D. hardly