Without the air to hold some of the sun's heat, the earth at night _________,too cold for us to live.
No sooner _____ themselves in their seats in the theatre _____ the curtain went up. A. they have settled; before B. had they settled; than C. have they settled; when D. they had settled; than
Both sides have accused of breaking the contract of ____.
Now that she is out of a job, Lucy ____ going back to school, but she hasn’t decided yet.
Word comes ____ free books will be given to ____ come first in this book store.
____ from the moon, our earth with water ____ seventy percent of its surface, appears as a blue ball.