.
We must apply what we have learned to our daily work because in no case _______ from practice.
| A．should theory separate | B．should theory be separated |
| C．theory should separate | D．theory should be separated |
Little _______ that the region was rich in natural resources about four decades ago.
| A．we did know | B．knew we | C．did we know | D．we knew |
The purpose of a class is to teach you to think creatively and not to follow your teacher_________.
| A．willingly | B．blindly |
| C．carefully | D．closely |
It’ll be another 50 years _________ China is expected to reach the level of a medium developed country.
| A．since | B．before | C．that | D．when |
What about todays temperature?
-- Its the same as, if the weather report is exact as usual, ___ of yesterday.
| A．one | B．it | C．that | D．what |
Most environmental problems exist because adequate measures for preventing them ____in the past.
| A．not being taken | B．didn’t take |
| C．were not taken | D．haven’t taken |