----Look at the clouds. It is going to rain.----______ . Let’s go home quickly.
Be careful _ too fast, or there _ be an accident.
_______lovely weather and ________ nice time we have !
The maths problem is very easy, _____ I don’t think all of you can work it out.
Thank you for ______ me go on the trip ,Mr Wu.
We talked _______ until Mr Wu asked us _______.