Mr. Hu, can you tell us how to learn swimming well—Sure. But remember we can learn nothing well _______ hard work.

Cars, buses and bikes ________ stop when the traffic lights turn red.

Ted has made up his mind to give it up, buton _____ second thoughts he determined to try______ third time．

No one answered when I phoned this morning. Wherewere you— I forteeth in the dental clinic.

What action should they _______ such a thing happening again