— What should we do to prevent the flu?—We should keep our rooms_____ and the air fresh all the time.A. cleaning B. cleaned C. clean
A smile costs ______, but gives much.
It’s beyond doubt ______it will ____ later in the day. Take a raincoat with you.
It was _______pleasant surprise for the mother to see her son ____had been missing for nearly ten years that she didn’t know what to say.
Not only the twins but also their cousin Jim _______ been to Japan, but _______ of them can speak Japanese.
The exercises ________to be harder than we thought. You should practice more before the exam. Remember, practice makes perfect.