They came to the city the day before yesterday, ______ they?A. did B. weren’t C. didn’t
—How many birds can you see in the trees? —I can see ______ birds.
______ junk food is unhealthy food, ______ lots of kids like eating it.
I study _____ my math test ______Tuesday afternoon.
There’s ____ in the book, so no one is interested in it.
Tom wants to be ____ engineer when he _____ up.