that the young fellow has only been learning how to drive for three months, his driving skill is fairly good.
—Why do you look worried? —Fred left the company half an hour ago. His work ________ unfinished since.
She ought to stop working; she has a headache because she ________ too long.
When I called you this morning, nobody answered the phone. Where ________?
—Did Alan enjoy seeing his old friends yesterday? —Yes, he did. He ________ his old friends for a long time.
—Will you go to the park now? —Not until I ________ my physics exercises.