. Each of you ______ responsible for the accident.
| A．am | B．be | C．is | D．Are |
The little boy was watching a late night film at home ________, right in the middle of a thrilling scene, the television went blank.
| A．which | B．when | C．where | D．that |
It sounded like a good idea, but _______it didn’t work.
| A．on average | B．in theory |
| C．in practice | D．on the spot |
The quality of the goods in this firm is _______ to the customers, as there has been no complaint since it was founded.
| A．guaranteed | B．pretended | C．demanded | D．extended |
After he retired from office, Tim ________ painting for a while, but soon lost interest.
| A．set up | B．took up | C．picked up | D．made up |
China has seen _______dramatic decline in rural poverty, but the problem is on _______increase in Africa and South Asia.
| A．a; \ | B．\ ；the | C．the ;an | D．a; the |