20. _______, English is one of the most important subjects.
--Excuse me, sir, _______________ --I’d like a cup of coffee and two pieces of bread.
Most people are familiar with the idea that all matter in the universe ________ atoms.
There were no tickets _________ for Friday’s performance so we went to the cinema instead.
On top of the books ____ the photo album you’re looking for.
The time that he ________ in playing computer games each day is about two hours.