When a new disease breaks out, experts must ________ what to do in the fastest way.
—Is there any possibility you could pick me up at the airport ?—No problem.
It is not immediately clear _______ the financial crisis will soon be over.
--Do you live____________ near Jim? --No, he lives in another part of the town.
On the long journey, Peter ________ a most interesting guide. We all had a wonderful time.
__________ entered the office when he realized that he had forgotten his report.