The noise of a nearby construction site terrified the shrimps that need a quiet environment, and ______ caused their death.
I don’t think ____ possible to master a foreign language without much memory work.
Is ____ necessary to complete the design before National Day?
Was it during the Second World War_____ he died?
Joan had often heard____ said that Marley had no money.
I hate___ when people talk with their mouths full.