The world is changing fast.I strongly believe that one will easily fall behind _______ he keeps on learning.
| A．unless | B．if |
| C．when | D．as |
----Why do you often ______this pink blouse?
----Because it fits me well.
| A．put on | B．wear | C．buy | D．try on |
Jack always runs faster than Peter, but this time he ______him.
| A．went over | B．fell behind | C．put off | D．dropped off |
The Internet ______it easy to get much new information in a short time.
| A．finds | B．makes | C．feels | D．takes |
We __________out by that time that he_________ a thief for a longtime.
| A．had found, had been | B．had found, was |
| C．found, had been | D．found, was |
It so happened that they________ the novel before.
| A．had read | B．would read | C．were reading | D．Read |