词形填空 (根据句子的要求,用括号中所给词的正确形式填空。每小题1分, 共计10分)We would brush our __________ (tooth) every day.Mr. Zhang teaches __________ (we) Chinese this term.Sally got many gifts on her __________ (twelve) birthday.Selina was __________ (happy) to hear the sad news.Chenglong is one of the most famous __________ (act) in China.This physics problem is much __________ (difficult) than that one.They often go hiking on __________ (sun) days.Would you please keep the door __________ (open)? It’s very hot here.Everyone should be __________ (care) when he walks across the busy street.Mrs Brown walked __________ (quiet) out of her room in order not to wake up the children.