He bought a book that could glee him much knowledge and ______ could help him to kill the time.
It was __________ fan that we couldn't hear anything.
Gunpowder,__________ we all know, was invented in ancient China.
Strong typhoons hit this area very __________. Normally, they form and come here between July and August every year.
We all write __________, even when there's not much to say.
—Do you think our basketballers played very well yesterday? —__________.