My friend’s flight had taken off _________ I got to the airport to see him off.
| A．while | B．after | C．before | D．until |
Mr. Li makes me ____, because it is bad for my health.
| A．don’t smoke | B．not smoke |
| C．not smoking | D．not to smoke |
Tom didn’t go hiking with his classmates ____ his illness.
| A．because | B．because of | C．as | D．since |
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 |