When changing lanes, a driver should use his turning signal to let other drivers know .
| A．he is entering which lane | B．which lane he is entering |
| C．is he entering which lane | D．which lane is he entering |
The ____ tall pole cast a ____ long shadow.
| A．ten feet; twenty feet | B．ten feet; twenty-foot |
| C．ten-foot; twenty-foot | D．ten-foot; twenty-feet |
_____ from the past performance, he is not likely to do very well in his exam.
| A．Judging | B．Judged | C．To judge | D．Having judged |
The two leaders have _____ the foundations of a new era in cooperation between their countires.
| A．laid | B．lied | C．lain | D．set |
Rainforests___________and burned at such a speed that they will disappear from the earth in the near future.
| A．cut | B．are cut | C．are being cut | D．had been cut |
The boy is most___________to make a great difference in the future, because he is so bright. Besides, he works extremely hard.
| A．likely | B．possibly | C．probably | D．perhaps |