Some countries have banned smoking in public places ______ public health.
Though he said he was a doctor, ________, he knows nothing about medicine.
_______by the teacher, she took two books away from the reading room.
When he come back to life, he found himself________at the entrance to the valley.
I will look into the matter as soon as possible. Just have a little___________.
----Can I take your______,Sir?----Please wait for a moment.