_____ is known to everybody, the moon travels round the earth once every month.
| A．It | B．As | C．That | D．What |
Last year I applied to Princeton University. I ________ they would say yes — but they did, and now here I am．
| A．never think | B．am never thinking |
| C．have never thought | D．never thought |
I shall never forget the days ________ I spent in Beijing University, ________ has a great effect on my life.
| A．that; which | B．which; that | C．when; that | D．when; which |
Jane _________ under the pressure of work and she had to stay in hospital for a month.
| A．broke up | B．broke down | C．broke out | D．broke away |
— Do you know how I can ________ him?
— On his mobile phone．
| A．learn | B．reach | C．seek | D．touch |
Although she has a lot of problems, she manages to remain ________.
| A．optimistic | B．cautious | C．concerned | D．upset |