---I have got a headache.----No wonder .You _______in front of that computer too long .
—Hello, JinlingHotel. What can I do for you? —Do you have a room __________ for this weekend?
When I went to the lake, my father was__________ fishing.
He is always full of __________ as though he has neverknown tiredness.
At present we have no __________ of life on otherplanets.
This book __________ ten units,__________ three main revision.