Had they known what was coming next, they second thoughts.
| A．may have | B．could have |
| C．must have had | D．might have had |
So much of interest ______that most visitors simply run out of time before seeing it all.
| A．offers Beijing | B．Beijing offers |
| C．does Beijing offer | D．Beijing does offer |
You _______ an A on your term paper, but you quoted a little bit more from others' papers.
| A．should receive | B．could have received |
| C．would receive | D．must have received |
Tom looked upon the test as an obstacle _____ his classmates regarded it as a challenge.
| A．while | B．because | C．unless | D．if |
You don’t have to ______every little incident in your life.
| A．settle down | B．break down | C．set up | D．set down |
--Why are they _____ the forest?
--They are _____ a thief.
| A．searching; searching | B．searching for; searching |
| C．searching; searching for | D．searching for; searching for |