The house built of stone lasts longer than ____ built of wood.

—Would you like tea or coffee?—    , thank you. I’ve just had some water.

  is known to us is that tobacco contains nicotine and other harmful products，so you should give up smoking．

---- Did you go on many of the hunting trips?  ---- No, ________.

 The invention of artificial hearts marked a turning point in the battle ________ heart disease.