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1.The research is so designed that once____nothing can be done to change it.A.begins B.having begun C.beginning D.begun2.____such heavy pollution already,it may now be too late to clean up the river.A.Having suffered B.Suffering C.To suffer D.Suffered3.European football is played in 80 countries,____it the most popular sport in the world.A.making B.makes C.made D.to make4.The purpose of new technologies is to make life easier,____it more difficult.A.not make B.not to make C.not making D.do not make
1.The research is so designed that once____nothing can be done to change it.A.begins B.having begun C.beginning D.begun2.____such heavy pollution already,it may now be be too late to clean up the river.A.Having Suffered B.Suffering C.To suffer D.Suffered3.European football is played in 80 countries,____it the most popular sport in the world.A.making B.makes C.made D.to make4.The purpose of new technologies is to Make life easier,____it more difficult.A.not make B.not to make C.not making D.do not make