Without the air to hold some of the sun’s heat, the earth at night_____very cold, too cold for us to live.
I suppose you are unwilling to change your idea, _____?
–Do you know where David is? I couldn’t find him anywhere. – Well. He _____ have gone far — his glasses are still here.
–What is the man, actually? – I don’t know for sure. But I think he can be _____ but a policeman.
The start of a new year brings hope — hope _____ better health, more happiness and greater success.
---Is Sarah coming ? --- No. She should have let us know earlier , but _______ she has been very busy recently.