These days he has made _____ in his studies by working hard.
| A．many progress | B．a lot of progresses | C．much progress | D．many a progress |
I haven’t seen______ this since I collected stamps.
| A．as old a stamp as | B．so an old stamp as |
| C．stamp as old as | D．as an old stamp a |
—— What do you think of the concert?—— Oh, it was______success.
| A．a very | B．quite a | C．so | D．really |
The plane flew smoothly ______ in the sky and people spoke ______ of theexperienced pilot.
| A．high；high | B．highly；highly | C．high；highly | D．highly；high |
Professor White has written some short stories, but he is _____ known for his plays.
| A．the best | B．more | C．better | D．the most |
How beautifully she sings! I have never heard _____ voice.
| A．a better | B．a best | C．the better | D．the best |