_____never gives up will succeed.
| A．Whoever | B．Who | C． No matter who | D．Whom |
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 |
Some friends tried to settle the quarrel between Mr. and Mrs. Brown without hurting the feeling of _____ , but failed .
| A．none | B．either | C．both | D．neither |
—Why? Where is the key to the meeting room?
—Dear me! You ______ it in the taxi!
| A．had never left | B．didn’t leave | C．never left | D．haven’t left |
____in faraway northwest , this place has its beautiful fresh air .
| A．Being located | B．Located | C．locating | D．To be located |