—Mom, my classmates invited me ____ a field trip. May I go with them?—OK.
Bob looks very happy today because he got ______ “A” on his Chinese test.
—_______ do you go walking? — Three times a week.
_______a lot _______ fun.
— Jenny, will you please _______ my dog for three days? — Yes, of course.
---Who cooks dinner in your family? --- My father _________.