Just as the experts _______ it, this kind of material is not natural, but man-made.
| A．get | B．put | C．make | D．mean |
What will the world use for power when it________ oil?
| A．run out of | B．is running out of |
| C．has run out of | D．ran out of |
This book tells_____life story of John Smith, who left______school and worked for a newspaper at the age of 16.
| A．the; 不填 | B．the; the |
| C．a; the | D．a; 不填 |
---Believe it or not, I have met him before.
---No kidding? ______ you’ve never mentioned it?
| A．What if | B．What for |
| C．How come | D．How about |
It is our duty to try to ______ production and reduce the number of things we make and buy.
| A．cut back on | B．put up with |
| C．hold on to | D．run out of |
Our factory has been developing rapidly this year. This year’s production is five times _____ it was ten years ago.
| A．that | B．what |
| C．which | D．as |