These teams, which _____twenty experienced workers, are working hard here to ___the time they have lost before.
A thief slipped into the room without ______.
. The happy look on his face suggested that he ________the final examination successfully.
I would have come sooner but I ________ that they were waiting.
___________ we should do to protect wildlife?
— Do I have to clean the dining room now? — No, you ______.