The past two years ________ a sharp rise in oil price，which adds to the burden of auto transportation industry.
A．witnessed B．has witnessed
C．is witnessing D．witnesses
—Jack is always studying hard and does well in all subjects.
—No wonder he ________ to be admitted to Beijing University.
A．is expecting B．will be expected
C．is expected D．will expect
Just an hour ago he was telling me on the phone that he ________ home right after the work.
A．comes B．came
C．would come D．will come
Tom is very happy in China during this period because his Chinese ________ every day.
A．has improved B．is improving
C．improved D．is improved
—I guess you can buy such a smart phone for 300 dollars.
—I could just two months ago，but the price ________ by 20%.
A．went up B．had gone up
C．has gone up D．goes up
The London 2012 Olympic Games marks the third time that London ________ the right to host the modern Olympics.
A．had had B．has
C．had D．has had
