Mary is always ready to do some __ work at the local geracomium（敬老院）in her spare time.
| A．responsible | B． exhausting | C．voluntary | D．professional |
Further space exploration has been _______ with the rapid development of China’s science and technology.
| A．made it possible | B．made possible |
| C．made it possibly | D．made possibly |
Mr. Fox fell ill, thus __________ it necessary for us to find another person for his job.
| A．having made | B．made | C．making | D．to make |
Recently ,the European Union(EU) has decided to provide ＄30 billion of emergency fund to help ________ the financial crisis that is happening in Greece.
| A．release | B．represent | C．relieve | D．recommend |
. --- Did you often e-mail your family during the first year at university?
--- No. I was so busy meeting new people that I didn’t write to my family as I _____.
| A．ought to | B．should do | C．should have written | D．should have |
Cable TV began in 1948 in the USA, but it took 50 years________ 66 percent of American households had it.
A. before B. after C unless D. since