问题
选择题
—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
答案
答案：B
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—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
答案：B