—What would you wish to do if you were a college student again?
—That's very hard to say, but I wish I___________ when I was a college student.
| A．has not studied biology | B．did study biology |
| C．had studied biology | D．studied biology |
He seized me ___ arm.
| A．by the | B．by my | C．by an | D．by a |
—____busy schoolwork,the children also have to take arts,music and sports
classes in their free time.
—I wonder what they will become.
| A．Rather than | B．Owing to |
| C．Except for | D．Apart from |
How can you expect to get anything____ you never give?
| A．in case | B．even if |
| C．unless | D．when |
There are many kinds of birds in Australia,and over 140 species of snakes,many of
____are extremely dangerous.
| A．them | B．which |
| C．what | D．those |
Private cars are required to take turns off roads one out of five weekdays ____the
traffic pressure.
| A．to reduce | B．reducing |
| C．reduce | D．reduced |