—Lisa, what do you think of the job of being a nurse?
—In my opinion, it ____ be difficult sometimes though it seems easy.
| A．should | B．can | C．must | D．need |
It ______ me that 1 could buy the admission ticket of the exhibition at the discount of 50% with my student card， ______ made me extremely excited.
| A．happened to; that | B．occurred to; it |
| C．happened to; which | D．occurred to; which |
It's a great ______ to know you, a world-famous physics scientist.
A, precaution B. privilege
C. privacy D. prescription
—Why did the police ______ the crowd?
—Because the president's car ______ in the street.
| A．break down； broke down |
| B．break up； broke up |
| C．break down; broke up |
| D．break up； broke down |
—Have you ______ some new ideas?
—Yeah. I'll tell you later.
| A．come about | B．come into |
| C．come up with | D．come out with |
The new magazine is intended for a generation of active men and women who seek new and challenging ways to ______ and experience the world.
| A．export | B．explore |
| C．exploit | D．express |