用所给词的适当形式填空。每词限用一次
ask, be, come, not know, e-mail
【小题1】________ on, Amy! The bus is coming.
【小题2】My balls ________ in the box.
【小题3】Please ________ the teacher for the bag.
【小题4】You can ________ me at abcd789@163.com.
【小题5】— Where are the CDs?
— Sorry, I ________.