选出正确的词或词组写在句中的横线上。
（1）She ______ ( has / have) short hair.
（2）________( How much / How many) pencils do you have?
（3）----Who is this boy? ---____( He's / She's ) Mike.
（4）Let ____ ( I / me) clean the window.
（5）_____( Me / My ) schoolbag is heavy.