The Blacks ______ dinner when I knocked at the door.A. is having B. are having C. were having
---Hi, Lily. ______.---Hi! I’m very well, and you?
Kim is my ______ name and Miller is my ______ name.
My brother ______ a soccer ball and I _____one.
---What’s ______?---It’s 0575-87983052.
Is that _______ UFO in the sky(天空中)?