5. “Have you seen _____ pen? I left it here this morning.” “Is it _____ black one? I think I saw it somewhere.”
| A．a, the | B．the, the |
| C．a, a | D．the, a |
We need to increase employment. We need to reduce crime. And _______, we need to protect our environment.
| A．really | B．finally |
| C．firstly | D．seriously |
Though his teachers were quite satisfied with his performance, he thought he ____ better if he had tried harder.
| A．could have done | B．should have done |
| C．ought to have done | D．must have done |
Riddle guessing on New Year’s Eve has become my family ________ for many years.
| A．habit | B．act |
| C．tradition | D．way |
Bravely ________ they fought, they had no chance of winning the match.
| A．though | B．if |
| C．as | D．because |
I used to think that roses were ______ red or white, but now I know there are yellow and blue roses.
| A．neither | B．nor |
| C．either | D．both |