选词填空专项训练
( 1 )
【well , soft, second ,better , may , strongly, afraid, sand , stay up,  if, now, house】
 We can’t stop an earthquake(地震), but we can do things to make sure they don’t destroy(毁坏) whole cities. First, it is not a 1 .________  idea to build houses along lines where  2. ________ of the earth’s plates(板块) join together. Second, if you think there  3. ________ be an earthquake, it is better to build houses on rocks , not on  4. ________. Third, you must make the houses as  5. ________ as possible. Weak buildings will fall down in an earthquake, but strong ones may  6. ________ .  .