Teenage is an especially important stage for us, ______we are supposed to go all out to improve ourselves because anything can happen.
The scientist is well known us his great achievement.
My name is Robert, most of my friends call me Bob for short.
I ran an old friend of mine yesterday,whom I hadn’t seen for ages.
She thought I was talking about her daughter,,in fact,I was talking about my daughter.
He decided to the matter himself.