Wind power is an ancient source of energy we may return in the near future.
| A．on which | B．to which | C．by which | D．from which |
The final examination is coming up soon.It's time for us to our studies.
| A．get down to | B．get out |
| C．get back for | D．get over |
Maybe you have been to many countries，but nowhere else such a beautiful palace.
| A．can you find | B．you could find |
| C．you can find | D．could you find |
—How often do you eat out？
— ，but usually once a week.
| A．Have no idea | B．It depends |
| C．As usual | D．Generally speaking |
You can't predict everything. Often things don't ________ as you expect.
| A．run out | B．work out |
| C．break out | D．put out |
Not until he retired from teaching three years ago ________ having a holiday abroad.
| A．he had considered | B．had he considered |
| C．he considered | D．did he consider |