根据中文提示,完成横线所缺单词,每空一词。(本大题共10分，每空2分)
My parents bought many ________________（礼物）for us on Children’s Day.
We _____________（唱）an English song last class.
His leg ____________ (伤害), so he can’t run.
Tom had a _______________ (牙痛) last night.
Sarah feels unhappy, because she’s _______________（重）than before