I didn’t know it could do terrible ______toyour heart and lungs or ______was more difficult for smoking couples to becomepregnant.

The driver is sitting in front of his car and there is another car in front of it.

Our monitor is the first person we can think of ________, for he is always willing to help ________ is in trouble.

yplaces in China, bicycle is still poplarmeans of transportation.

Don’t take his remarks too seriously He was so sadthat I don’t think he really _________ what he was saying