—Listen! There is a knock on the door． Who _____ it be?
—It must be Jack． Just now I sent for him．
| A．shall | B．can | C．must | D．might |
There is nothing more I can try _______you to stay, so I wish you good luch.
| A．being persuaded | B．persuading | C．to be persuaded | D．to persuade |
______ by a greater demand of vegetables, farmers have built more green houses.
| A．Driven | B．Being driven | C．To drive | D．Having driven |
The crowd cheered wildly at the sight of liu xiang, who was reported _______ the world record in the 110-meter hurdle race.
| A．breaking | B．having broken | C．to have broken | D．to break |
—Come on, please give me some ideas about the project.
—Sorry. With so much work _______ my mind, I almost break down.
| A．filled | B．filling | C．to fill | D．being filled |
The wild flowers looked like a soft orange blanket _____ the desert.
| A．covering | B．covered | C．cover | D．to cover |