The teacher demanded that the exam before eleven.
| A．must finish |
| B．would be finished |
| C．be finished |
| D．must be finished |
A hearty laugh relieves physical tension, ________ your muscles relaxed for over half an hour.
| A．to leave | B．left |
| C．leaving | D．leave |
The lady was so absorbed in her job that she didn't hear a customer ________ at the door.
| A．to knock | B．knocking |
| C．be knocked | D．knocked |
Over 200,000 hotel reservations were made in Hong Kong through Taobao last year, ________ it the most popular travel destination among Chinese netizens.
| A．making | B．to make |
| C．having made | D．made |
According to the new law, the people found ________ “harmful” advertisements on the streets will be punished strictly.
| A．put up | B．to put up |
| C．putting up | D．having put up |
We tried ________ the window, but it was still hot in the room.
| A．to open | B．opening |
| C．open | D．opened |