We must know what we should do and what we should avoid ______a good impression on others in public place.
| A．to leave | B．leaving | C．to have left | D．leave |
It's no good ________ here this morning. Come again on Monday.
| A．wait | B．waiting |
| C．having waited | D．to be waiting |
All the books ________ by the students are reported to have been sent to the children in the countryside the other day.
| A．having offered | B．to be offered |
| C．offering | D．offered |
If you decided to study in America, you have no choice but ________ your English greatly.
| A．improves | B．improving |
| C．to improve | D．improve |
Barbara often makes a schedule to get herself ________ of what she is to do in the day.
| A．remind | B．reminded |
| C．reminding | D．to remind |
One evening Harry phoned me, ________ me to come to his flat as soon as possible.
| A．asked | B．having asked |
| C．asking | D．being asked |