The forests are getting fewer and fewer. We must _________ down too many trees.

Oh, it _____ so nice! What beautiful music it is!

His sacrifices for the country were never officially ________________, which made all of us feel discouraged. [ ]

Is it all right if I come at about 8.30 ? — No, I ________ the football match then

We got lost in the forest and decided toremain _____ we were and waited for rescue．