The old man used __________ in front of his house and he has got used to __________ like that.
| A．to sit; doing | B．to sitting; do |
| C．to sit; do | D．to sitting; doing |
It was several minutes before I waswhat was happening.
| A．aware | B．concerned | C．awake | D．ashamed |
John opened the door. Therehe had never seen before.
| A．a girl did stand | B．a girl stood |
| C．did a girl stand | D．stood a girl |
—Is Bob still teaching?
—I’m afraid not. He is saidthe school as he has become a businessman.
| A．that he has left | B．to leave |
| C．to have left | D．to be left |
—I wonder how much you charge（要价） for your services.
—The first two are freethe third costs￥30.
| A．while | B．until | C．when | D．before |
The discovery of the stolen car led to.
| A．the thief having caught | B．the thief catching |
| C．the thief being caught | D．the thief to be caught |