I went to see Professor Johnson, only ______ that he had left the city the night before.
| A．to learn | B．learn |
| C．learned | D．learning |
It ___ that Napoleon always asked the same three questions, and usually in the same order.
| A．said | B．is believed | C．was well known | D．believed |
The population of China ___ over one thousand million.
| A．is | B．are | C．has | D．have |
I hace no pen ___.
| A．to write with | B．to write | C．to write on | D．for writing |
--What did you arriver here? ---Just ___ when he married.
| A．in the same morning | B．on the night | C．at the night | D．on very afternoon |
—____ you got to know I traveled to USA?
—Through one of your colleagues.
| A．Where it was that |
| B．When was it that |
| C．How was it that |
| D．Why was it that |