—John has put forward ________ most challenging question for us to answer.
—Yes，it really is.I have never heard ________ harder one.
| A．the；/ | B．/；the | C．the；the | D．a；a |
You should correct all the mistakes as soon as possible before the book _____.
| A．goes out | B．puts out | C．sets out | D．comes out |
How can they learn anything _____ they spend all their spare time watching television?
| A．for | B．when | C．while | D．because |
We congratulated Jerry ____ the championship.
| A．on winning | B．winning |
| C．to win | D．about winning |
It took my father half an hour to finish ____ my bike.
| A．repairing | B．repair | C．to repair | D．repaired |
Most students in my class are never _____ in the morning classes.
| A．of their best | B．for their best |
| C．in their best | D．at their best |