The camera is ____ expensive ____ I can’t afford it.
—Thank you very much for helping me out of trouble, Bob.—________.
Cheer up! It won’t be ______ we can meet again.
______ the ancient Egyptians built the pyramids puzzled people for centuries.
The boy as well as the two dogs _____ when the earthquake rocked the city.
—Sorry, the tickets have already been sold out.—Really? Maybe I _______ a little earlier.