I _____ my university professor in the supermarket near my house, which was out of my expectation.
.It was the practice _____ he got abroad _____ made him a good English speaker.
.—What _____ this time tomorrow morning? —Er…, I’m not sure for the moment.
.No important progress was made in the UN Climate Conference in Copenhagen as ______ of the rich countries agreed to offer large amounts of money to fight global warming.
A number of people suffer ill effects from drugs ______ they take the drug exactly as directed.
The silence of the library is sometimes broken by a sudden cough or the sound of pages _____.