Many factories poured out dirty water and polluted the Pearl River.A. made ... cleanB. made ... fullC. made ... dirty
The food in the fridge _________ bad. Throw it away, please.
--- You should be careful when ________. --- Yes, I will. I’d like to know when ________ to have a rest.
I prefer ________ at home ________ some reading to ________ shopping.
It’s selfish ________ him ________ the cakes with others.
This is _______ song I have introduced you many times. Isn’t it _______wonderful one?