—Shall we go out for a walk?—Sorry, I can’t. I _____ my homework.A. do B. was doing C. am doing
This is Tom.____ is a teacher.
--____ is she?--She is my sister.
927-31 is ________in English.
There is ____ “u” and _____ “r” in the word “number”.
______ a boy. My name is Mike.