—What else should we pay attention to ________ building the bridge?—The change of the weather, I think.
Do you prefer _______?
—Mr. Hu, can you tell us how to learn swimming well? —Sure. But remember we can learn nothing well _______ hard work.
You _______ wash your hands before meals. It is good for your health.
It’s hot here. Please keep the windows _______.
Sally sings pretty _______ and she is also _______ at dancing.