In some cities the traffic police use computers to keep the traffic________smoothly.

he same in China — many people, ________some are not overweight at all, are always going on diets or taking weight-losspills, ________ are often dangerous

Thedoctors must get there in half an hour There should be no____ in sending the bloodto the dying girl

Please a book me.

rue that everyone loves a mystery,___________ when mixes history with fiction. That’s why “ The Da Vinci Code ”is so popular.