.I was about to leave_________I saw him_______ towards me, with a bag in hand.
---Who would you rather ________ the English Speech Contest? ---- Li Ping, I think , is the best choice.
You can’t imagine what difficulty we had ________ home in the snowstorm.
My friend just cannot _______ to the different life style here in American.
With the food and drink _____, the prisoner had to walk out of the cave where he was hiding.
Some people argue using _______ nature to meet our own needs may spell disaster, unless we start to look around and understand how _________ clean environment benefits us all.