—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
—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
B
副词的比较级 句意“我们做了很多来保护环境，但是还不够。所以我们更应该努力的来保护”。