Thank you for sending us ____ fresh vegetables of many kinds. You have done us ____ a great service.
| A．不填；a | B．the；a | C．不填；不填 | D．the；不填 |
Leonardo da Vinci(1452-1519)__________ birds kept in cages in order to have the pleasure of setting them free.
| A．is said to be buying | B．is said to have bought |
| C．had said to buy | D．has said to have bought |
The children talked so loudly at dinner table that I had to struggle __________.
| A．to be heard | B．to have heard |
| C．hearing | D．being heard |
—The last one __________ pays the meal.
—Agreed!
| A．arrived | B．arrives |
| C．to arrive | D．arriving |
—It’s a long time since I saw my sister.
—__________ her this weekend?
| A．Why not visit | B．Why not to visit |
| C．Why not visiting | D．Why don’t visit |
When asked why he went there, he said he was sent there __________ for a space flight.
| A．training | B．being trained |
| C．to have trained | D．to be trained |