一、选择填空（20分）。
( ) 1. My _______ sister will go to school this September.
A. five year old B. five-years-old
C. five years’ old D. five-year-old
( ) 2. Tom _______ up early. But now he gets up very late.
A. is used to get B. used to get
C. was used to get D. is used to getting
( ) 3. On summer nights, I often go to sleep _______ the windows open.
A. in B. with C. have D. let
