WE ARE GOING A LOT TO PROTECT OUR ENVINNRNENT,BUT IT IS NOT

WE ARE GOING A LOT TO PROTECT OUR ENVINNRNENT,BUT IT IS NOT GOOD ENOUGH.SO WE SHOULD TRY __TO LOOK
ARTER IT.
A:HARD ,B:HARDER C:HARDES D:HARDLY

B
更加的努力
百度银牌军----大科学 【彭彭】原创答案.
请及时采纳.有不懂欢迎追问.
再问： 为什么不用原级
再答： 前面说了 it is not good enough 所以我们要更努力去做。 这个是句意理解