10.No important progress was made in UN Climate Conference in Copenhagen as__________of the rich countries agreed to offer large amounts of money to fight global warming.
There’s no light on — they __________ be at home.
— Could I have a word with you, mum? — Oh dear, if you __________.
—Is Jack on duty today? —It __________ be him. It’s his turn tomorrow.
As you worked late yesterday, you __________ have come this morning.
— Must he come to sign this paper himself? — Yes, he __________.