I ______ go to bed until I ______ finished my work. a. don’t/had b. didn’t/have c. didn’t/had d. don’t/have
He transplanted the little tree to the garden _____ it was the best time for it.
“Is there _____ here?” “No, Bob and Tim have asked for leave.”
I'll come to see you if _____.
—Must I turn off the gas after cooking ? —Of course . You can never be _______ careful withthat.
_____ is known to everybody, the moon travels round the earth once every month.