--- I’m sorry．I’m afraid I was mistaken．
--- ________．
| A．All right | B．Excuse me | C．That’s all | D．Don’t worry about it |
. ___________ she was chosen made us very happy.
| A．What | B．That | C．Why | D．How |
Ten years ________a long time in one's life.
| A．has been | B．are | C．is | D．have been |
— It’s the office! So you know eating is not allowed here.
— Oh, sorry.
| A．must | B．will | C．may | D．need |
It is known to all that ____ computer was invented in the USA.
A. that B. / C. the D. one
You will be late _____ you leave immediately.
| A．unless | B．when | C．while | D．as |