The gas tank____________ twenty gallons of gas, but now it may____________ only three gallons.
This heavy rain made______ impossible_______ us to complete the task on time.
It____ ten years ______ I graduated from university.
--Your father is sleeping. Don’t ______, will you? --No, I won’t.
______ it is to have a cold drink after an _______ game!
--When ______CAAC flight 92 _______? --Just a minute and I’ll check the timetable.