Question

—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

Answer 1

B

形容词的比较级 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”。