there is _____a to do to look after our environment A.a lot

There is ___ to do look after our enironment. A.a There_ a lot to do _the old Museum.A is ,look after B is,to there _____a lot housework to do. We must do a lot of work to keep our environment clean and t We′re doing a lot to protect our environment ,but it is not There is a lot to see and do there There a lot of things to do . There's a lot to do there is a lot of housework to do.to do是定语还是主补? If there is a lot of homework to do,I'm happy to do it alone to look after my pets properly takes a lot of time中to look a Our teacher is going to give us a lot of --- to do this week