______boy with ______ apple in his hand is my best friend， Tom .
| A．A， the | B．The， a | C．A， an | D．The， an |
Miss Gao asked a question， but it was ___________that nobody could answer it.
| A．very difficult | B．too difficult |
| C．difficult enough | D．so difficult |
John called me as soon as he _______ my package.
| A．receive | B．will receive | C．received | D．Receives |
This room is _________for you to live in.
| A．big enough | B．enough big |
| C．small enough | D．enough small |
—Do you walk to school every day?
—I used to walk, but now I ride to school _______ walking.
| A．think of | B．care for |
| C．agree with | D．instead of |
______ careful you are, ______mistakes you will make.
| A．The more; the more | B．The fewer; the more |
| C．The more; the fewer | D．The less; the less |