______ by a greater demand of vegetables, farmers have built more green houses.
| A．Driven | B．Being driven | C．To drive | D．Having driven |
She changed so much that I could hardly _______ her when we met again after a separation of 20 years.
| A．recognize | B．know | C．remember | D．tell |
—When did you go to the United States?
-- I remember _______ there when I was ten.
| A．having taken | B．to be taken | C．being taken | D．to take |
I prefer studying English at home ______the match．
| A．to watching | B．to watch | C．rather than watch | D．rather than watching |
We can’t use the machine now, for it _______.
| A．has been repaired | B．is repairing | C．is repaired | D．is being repaired |
To her surprise, the life she had been looking forward to ________ to be unpleasant.
| A．prove | B．being proved | C．proving | D．proved |