It’s better ____ your voice down in public places.
--You didn't go to school yesterday, did you? --_____, though there was a heavy rain.
-- What happened to Jack?-- He because of his drunk driving.
--Excuse me, could you please ______ shout in the classroom? --Sorry! I will keep quiet from now on.
Tom is __________ clever __________ he can answer all the questions.
________ plastic bags we use, ________ it will be to the environment.