--Did you _______ to New York City with your mother?--No, I _______ there with my friends.
—When were you born? — I was born_______ a cold winter morning in 1996. A. on B. in C. at
When I came back yesterday evening, my brother _______ his homework. A. is doing B. has done C. was doing
—How often do you see your grandparents? —_______. A. Five days B. Once a month C. In a week
I usually go to school on _______ foot. A. a B. the C. /
Wang Yaping is the first woman astronaut who taught lessons in space. Do you know _______?