In the market, vegetables are sold by _______ kilogram, I mean, by _______ weight.
A．the; 不填 B．不填; 不填
C．the; the D．不填；the
"Charley Oakley, ______ NBA All-star, hasn't missed ______ game in the past three years." "I can hardly believe it."
A．an; the B．a; the
C．the; a D．an; a
The market for ______ used computers is getting larger and larger as______ years go on.
A．不填, 不填 B．the, 不填
C．the, the D．不填, the
"What about ______ school?" "It is as good, as anybody can see, _____ school as No 1 Middle School Attached to Hunan Normal University."
A．a; the B．the; a
C．a; a D．the; the
-John has put forward _______ most challenging question for us to answer.
-Yes, it really is. I have never heard _______ harder one.
A．the; 不填 B．不填; the
C．the; the D．a; a
I often have conversations with John over ______ telephone, while keep in touch with Tom by ______ letter.
A．不填；the B．不填；a
C．the；不填 D．the; a
