We'll have to work the clock if we want to complete the work on time.
He is the first person you can think of to rely on, for he is always willing to ________ whoever is in trouble.
—Why do you look so worried?
It won’t be quite a long time ________ your son is back, so don’t be worried.
—What's the matter with the man hanging his head there? —Well,if you ________ know, he was caught stealing my bike.
GM, Chrysler and Ford expressed their desire that they ________ in want of a $25 billion government aid to pull through the financial crisis.