My meals will be in complete___vegetables
I think it would ___ better if the goverment protect more land and grows more new trees
Planting__(a few of/ a row of/ a mass of/ a piece of)_ trees along the streets will bring you more fresh air
Why can not we use a lot of pesticides on vegetables?-well,the pesticide will make vegetables...( poisonous/ unclean/ indelible/ unpleasant)