Username must have between 4 and 14 characters,and password must have between 6 and 18 characters!

Invalid Username.You must have at least 4 characters and a max of 14 characters in your username. Username must have between 4 and 14 characters,and password must have between 6 and 18 characters! username Please enter the desired username.The username must be at least 5 characters long. Your username must be atleast 3 characters long. A username must with a ;etter and consist of letters Sorry,you have entered an incorrect username and/or password. must have He looks tired,he _______ too little sleep.A must have had B must have C must have been He can't find his key.He ---------- them.A.must lost B.must have been lost C.must have lost 英语翻译Your username must start with a letter!这句怎么翻译? Username must contain only letters and numbers.No special characters allowed是什么意思 The username must be alphanumeric and contains 4 to 30 characters.kuai The username may only consist of characters and numbers and must start with a character.//英语翻译 一道英语单选 _____he have been chosen as captain of the football team?Yes,he_____.A.Can;must have B.Must;must have C.Can;must D.Must;must I can't find my umbrella.You __________it in the office.A.must have forgotten B.must have left C.must leave D.must forget Mary must ______lessons. A.has B.have c.be You__me,beause i did not say that.A.must have misunderstood B.must misundertand