It’s cold， so we decided ______at home.

I recorded the professor’s speech on my cellphone _____ I could listen to it several times later

You`d better read the______ first before you use the camera.

Look at the sign! It says “No Swimming”. -Oh, sorry. I ____it.

What a clean and bright school,isn’t it ! –Yes, it’s always clean and bright ,because it _____ every day.