tooth 还是teeth?Instead of tooth, the blue whale has a row of bony plates in its mouth that functions as a food-collecting device.要帮我讲讲为什么哦 谢谢

no 后面加tooth还是teeth 翻译 他没有牙齿 是用tooth还是teeth teeth和tooth使用的区别是什么? 主语是复数宾语一定是复数吗Most of them have an apple还是applesMost of them have a sweet tooth还是have sweet teeth teeth和tooth到底哪个是复数?怎样区分好? 为什么刷牙是brush my teeth牙齿是tooth? That girl looked funny with a pair of_____.A false teeth B false tooth C wrong teeth D wrong tooth tooth 还是teeth?Instead of tooth, the blue whale has a row of bony plates in its mouth that functions as a food-collecting device.要帮我讲讲为什么哦 谢谢 teeth tooth的正确用法5只牙是five teeth or five tooth or five teeths or five tooths什么时候用tooth,一颗牙怎么说？ we should clean( )twice day A our tooth B our tooths C teeth D our teeth （）His_________are big ang sharp.A.tooth B.some teeth C.teeth i brush my teeth twice a day 为什么要用teeth而不是tooth Brush her teeth,还是Brushes her teeth tooth tooth tooth teeth和tooth怎么用1、It is important and good for us to keep our teeth clean and healthy.2、His tooth gave another red-hot jounce.teeth 和tooth 在运用的时候单复数怎么选择? do you know之后的疑问句是否要加助动词根据所给词的正确形式填空（不必一空一词）：Do you know how many _____（tooth）a tiger has中间是填teeth does还是只要填teeth,如果填teeth does 但是后面的has已经