.
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 |
– Excuse me, but is it possible for me to meet Mr. Smith in his office this afternoon?
– ________. How about 4:30?
| A．Not really | B．I am sure |
| C．Let me check | D．Never mind |
The refugee crisis（难民危机） in Europe, if ________ properly, can lead to serious social problems.
| A．not handled | B．not being handled |
| C．not to be handled | D．not having been handled |
It is generally cold and dry here in autumn, but sometimes, it ________ also be warm and rainy.
| A．may | B．should | C．must | D．can |
Thanks to the immediate measures taken by the central government, the economy of China ________ soon after the global financial crisis.
| A．took up | B．rose up | C．picked up | D．put up |
The difficulty lies in ________ they will come to our help immediately.
| A．whether | B．that | C．if | D．which |