今天,镇的领导参观我们的学校,你见到面时,该说:A. Welcome back to our school.B. Welcome to our school.C. The washroom is on the first floor.
What ___ they playing ?A. are B. am C. is
What are they ____?A.matter. B. doing. C. look.
She is ____.A. this B. what. C.talking.
We ___ a happy family.A. a B. is C.are
My mother ___ a doctor .A.am B. is C. are