By the time Jack returned home from America, his son __________ from college.
| A．graduate | B．has graduated | C．had graduated | D．had been graduated |
“Hope for the best and prepare for the worst.” is a proverb, ______ life is beautiful and full of
frustrations as well
| A．means | B．to mean | C．meaning | D．meant |
I agree with most of what you said, but I don't agree with __________.
A everything B anything C nothing D none
They _______ a certain amount of working experience through volunteer work.
| A．attempted | B．accumulated | C．abandoned | D．accomplished |
Bird flu , a contagious disease of animals , is believed ____ by viruses that normally infect only birds and less commonly pigs , and rarely humans .
| A．caused | B．being caused | C．to be caused | D．to have caused |
—I didn’t go to the Museum yesterday.
—Yes, but I would rather you ______there too.
| A．went | B．had gone | C．should go | D．would have gone |