----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．the, a | D．a, a |
_________ the problem of land erosion getting more serious, the government is searching for a way to deal with it.
| A．As | B．With | C．When | D．Because |
－Mom’s gift? She _______ have chosen a better one for me.
－She must be very happy to know it.
| A．should | B．might | C．couldn’t | D．mustn’t |
Everybody said it was an ideal marriage; no one had ever known ______ couple.
| A．the happier | B．a happier | C．a happy | D．the happiest |
Soccer is the most truly international team sport, but there’s still some question _______ whether it should be called a game or open warfare.
| A．due to | B．in addition to | C．as to | D．owing to |
In order to __________ a good command of German, she quitted her job and went to study in Germany.
| A．require | B．inquire | C．acquire | D．request |