Some kinds of animals can change their color with _______.
A. conditions B environment C. surroundings D. situation
Because of the Russian gas limit to Europe, attempts _______ to use botanical fuel as a source of power.
| A．have made | B．having made | C．are being made | D．will be making |
Chinese exports have been hit hard by falling world demand, with millions of workers _______ to their villages after the factories that employed them closed down.
| A．returned | B．returning | C．have returned | D．return |
There would be not a good harvest of wheat in North China this year _______ the big snow.
| A．in spite of | B．apart from | C．due to | D．in case of |
Yao Ming, a NBA superstar, became the boss of Shanghai basketball team, and is ready to _______ in new world of basketball.
| A．take off | B．get off | C．turn off | D．come off |
-- Director Wang, a man is waiting to see you outside, _______ he come in?
-- In a moment. I' m busy right now.
| A．Can | B．Shall | C．May | D．Would |