______ a phone is of great help, I don’t think it’s a good idea to spend too much time on it.
He never reads anything ______ is not worth reading.
The man ________ coat is black is waiting at the gate.
_________ cleans the classroom can go home first.
The police caught the man _______ stole my handbag.
The girl ________ is reading under the tree ________ my sister.