The students were so _______when they heard the _______news.
| A．frustrating, frustrated | B．frustrated, frustrating |
| C．frustrated, frustrated | D．frustrating, frustrating |
—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 _______?
| A．where is she from | B．where does she come from |
| C．where she comes from | D．where he comes from |