The hottest continent, Africa has a lot of resources, ______ are still undeveloped.

t on raining heavily for a wholeweek._________,we have big floods all around our town.

None of them had expected that the middleaged engineer died______his design uncompleted.[ ]

They found the body buried under a pile of leaves.

Why do you call him Mr. Knowledgeable—Because he knows almost everything we want to know.