1.I really don't know what I shouldn't do nextI really don't know what __________ _________ _______next.2.In the old days they didn't burn gas for cookingThey __________ _________ burn gas ________cook3.Some factories cause water pollution they need to be closedSome factories ______water pollution need _________.
热心网友
ould be done2.would not,to ducing,closing
热心网友
I couldn't do