________ his spare time that his English has improved a lot.
| A．So good use does he make of | B．Such good use does he make of |
| C．He makes very good use of | D．He makes so good use of |
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 |
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 |