You look so tired. You________have stayed up late again.
The government has taken some measures to solve the shortage of electricity, but it may be some time _________ the situation improves.
Mandela, having devoted all his life to the freedom of South African Blacks, is a real fighter for us to_________.
You cannot imagine what great trouble I took ______ your house.
Jordan kept his illness from his opponents before the final game ________ they might know about it.
— Have you seen ____ pencil? I left it here this morning.—Is it _____black one? I think I saw it somewhere.