______ by a greater demand of vegetables, farmers have built more green houses.
| A．Driven | B．Exhausted | C．Tracked | D．Balanced |
I suggested to my mother that she a drawing club after her retirement form teaching.
| A．join | B．joins | C．joined | D．would join |
--- Did you telephone Uncle Sam our plan for the Christmas holidays on his farm?
--- Yes, he was happy about our arrival, and he eagerly asked when .
| A．has we arrived | B．we had arrived |
| C．were we arriving | D．we were arriving |
When I got New York, I had to attend a school for students first language was not English.
| A．who | B．which | C．whose | D．where |
More than five doctors and rescuers have got to Yushu County up to now.
| A．thousand | B．thousands |
| C．thousand of | D．thousands of |
~You have helped me a lot. I can’t thank you enough.
--- ____
| A．Think nothing of it. | B．That’s right. |
| C．I don’t think so. | D．Be my guest. |