In January , 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
“Can’t you read?” Mary said _______ to the notice.
The teacher commanded that the exercises _______ in an hour. A. was finished B . were finished C should finish D. be finished
_______ is the most useful invention?
______his food______, the man had to come out of his hiding place.
As soon as he comes back, I’ll tell him when and see him.