I'm sorry you've been waiting so long,but it'll still be some time ________ Brian gets back.
It is well-known ______ a person, especially the old, eats too much he’ll feel uncomfortable.
I broke my relationship with John because he always found with whatever I did.
Walking and running are the oldest and newest, excellent _________ exercise for all ages and fitness levels.
—Do you think we can get there on time? —Yes,_______ the truck doesn’t break down.
The children were playing games on the playground, ________ school uniforms.