( )21. About two ______ students take buses to school in the town.
A. hundred B. hundreds C. hundreds of D. hundred of
( )22. –Do you know Li Ying? –Yes. She is an ______ girl from Shanghai.
A. eleven-years-old B. twelve-year-old
C. eleven-year-old D. twelve years old
( )23. --Where ‘s Mary? –She’s not in. She with her mother ______ at the supermarket.
A. shops B. is shopping C. shop D. are sh opping
