I'm going for a field trip but I haven't decided_________.
___________ a sportsman is a hard job, but you are very excited if you are successful in ____________a good medal.
---Which do you like ___________ , apples or pears? --- I like pears.
I always go to sleep ___________ the light on.
He finds watching movies ______because the people speak too quickly.
He used to spend a lot of time computer games.