____ that caused him to serve dinner an hour later than usual.
| A．It was we being late | B．It was our being late |
| C．It was we were too late | D．It was because we were late |
You are a student of ________ history Can you tell me something about ________ history of the Great Wall?
| A．/, the | B．the, / | C．/, a | D．a, / |
You should get rid of ________ habit of smoking in ________ public (places)
| A．the, the | B．/, / | C．the, / | D．/, the |
Jumping out of ________ airplane at ten thousand feet is quite ________ exciting experience
| A．/; the | B．/; an | C．an; an | D．the; the |
She is ________ new comer to ________ physics but she has made some useful inventions already
| A．the, the | B．the, / | C．a, / | D．a, the |
When you finish reading the book, you will have ________ better understanding of ________ life
| A．a; the | B．the; a | C．/; the | D．a; / |