_____ when one loses freedom does one know its value.
| A．Just | B．Only | C．Even | D．Ever |
—How long _____ he ______ in the USA?
—Three years. But he never regrets coming back to China.
| A．did;live | B．has;lived | C．does;live | D．will;live |
—Would you like tothe discussion this Saturday?
—Sorry, I have an important meeting to.
| A．attend; join | B．join; attend |
| C．join; take part in | D．join in; attend |
This is the first time that Iface to face with the president.
| A．had come | B．have come | C．came | D．come |
Silk from China found its way to India, the Middle East and Rome,spices(香料) and glass, which was not known to China.
| A．in exchange for | B．in return | C．in change for | D．in need of |
How time flies! It has been ten years I moved to Chongqing.
| A．when | B．that | C．before | D．since |