Jackie is only three years old __________ he can draw very well.

He is tall, _____ his son is short.

Bill can swim, _______ he can’t sing.

My father didn’t go to bed ______ he washed his car last night.

Although we are young, ______ we can still do something to help them.

We have two basketballs ,________we don’t play them.

He was ill, _______he still went to school on time.

The little boy is only six years old, _________ he can make wonderful model cars.
A. so   B. or   C. but

—What’s the matter with you? You look so worried.
-- I don’t know ___________ the problem.