Without the air to hold some of the sun’s heat, the earth at night ___, too cold for us to live.
He took up my cellphone and made a long distance call as if the phone _____ him.
The exhibition is well worth _____ and you can see fancy vases of different dynasties on show there.
—We’ve had three whole weeks without a drop of rain. —True. No crops will _____ if the dry weather continues.
There might be life on other planets, but so far scientists haven’t found enough _____ to prove it.
They are having _____ debate about whether the two countries were at _____ war at the time.