—We have done a lot to make our city cleaner，but it’s still not enough．
—So we should do________to improve it．
| A．less |
| B．higher |
| C．later |
| D．more |
Your mother prepared delicious food for us yesterday. Please say thanks ____ her.
| A．for | B．to | C．with | D．of |
Helen is 15 years old, and Joan is 15, too. So Helen is ____ Joan.
| A．as big as | B．as older as |
| C．as old as | D．so old as |
—What ____ news!
—Yes, all of the children were ____.
| A．excited; exciting | B．exciting; excited |
| C．excited; excited | D．exciting; exciting |
New York is one of ____ in the world.
| A．the large cities | B．the large city |
| C．the largest cities | D．the largest city |
Do you have difficulty ____ English?
| A．to learn | B．of learning | C．learning | D．learn |