______ the ancient Egyptians built the pyramids puzzled people for centuries.
A. Whether B. What C. How D. Where
The boy as well as the two dogs _____ when the earthquake rocked the city.
A. were sleeping B. is sleeping
C. was sleeping D. are asleep
—Sorry, the tickets have already been sold out.
—Really? Maybe I _______ a little earlier.
A. should come B. should have come
C. could have come D. must have come
From his voice on the phone, I know everything is going under way.
A. satisfy B. satisfying
C. satisfied D. satisfaction
The conference was ________ fixed for the 10th, August, but later the unexpected landslide (泥石流) in Zhouqu in Gansu province, made us put it off.
A．normally B．obviously
C．originally D．presently
It’s widely accepted that life is ___ there’s sunshine and water.
A. there B. where
C. in the place D. in which
