The head teacher with his students _________ Mountain Tai if it _________ tomorrow.
You _ to the meeting this afternoon if you have something important to do.
This fashion show in our school was so ________ that we heard ________ shouts everywhere.
–What did the old driver say ______ the bus? –He said his bus ______ an old friend and he missed it.
To make our city greener and cleaner, we need ______ trees.
–Why didn’t you answer my phone last night? –I ______ on my way home.