Don't have your children ______for hours doing their homework in ______dark a room.
A. sitting, so
B. sit, such
C. to be sitting, so
D. to sit, such
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My sister is used to ______with all the windows open.
A. sleep
B. have slept
C. sleeping
D. slept
______leaves the room last should turn off the lights.
A. Whoever
B. Anyone
C. Who
D. The person
It was quite some time ______the president managed to save his firm from near bankruptcy.
A. until
B. when
C. that
D. before
Everyone can borrow this dictionary ______he keeps it clean; otherwise he will have to pay
A. so that
B. as far as
C. as long as
D. as soon as