The emergency required that all the tasks _____ at least two days ahead of time. A.to complete B.should complete C.be completed Dshould have been completed
The president was deeply _______ the issue and ordered the officials to find out a solution as quickly as possible.
Tom, together with his friends, _______ to visit the Shanghai World Expo in the coming summer holidays.
When _______ there, the postman found the door locked and then stopped _______ the letter in the mailbox on the wall.
He doesn’t have the habit of planning his travel expense, so he won’t know what to do _______ the money runs out.
The news _______ is spreading around the airport is _______ a heavy storm is coming.