―Do you know where David is? I couldn’t find him anywhere.―Well. He ______ have gone far — his coat’s still here.
One of the advantages of, living on the top floor of a high-rise is that you can get a good __________.
He advised __________ at the school gate the next day.
I ________ him tojoin in "the ring school run",but he wouldn't listen to me.
—What was the result then? —The doctor was at last able to __________ drinking.
Many countries are increasing their use of natural gas, wind and other forms of __________.