Two years ago, three scientists traveled to the Antarctica to explore a secret world hidden _________ the ice.
Our success was largel_______the good cooperation of all team members.
For a long time they walked without saying _________ word. Mike was the first to break __________ silence.
. —How would you like your coffee?—________________.
The number of people invited _____ fifty, but a number of them ______ absent for different reasons.
He ______ have attended the meeting this morning. He has been staying at my home for a whole day.