题干
根据句意和首字母提示，完成句中所缺单词
①We should brush our____ (tooth) every day.
②—What’s Jane doing? —She’s b____ her sister.
③ What is she doing for v____ ?
④—How do you come to school? —I usually ride a b____ to school.
⑤ I want to s ____ an e-mail to my aunt.
答案(点此获取答案解析）
teeth,babysitting,vacation,bike,send
，
，则代数式
的值为（ ）