His uncle went abroad in 2010, and ________since.
| A．has not been heard of |
| B．had not been heard of |
| C．had not heard of |
| D．has not heard of |
—Would you do me a favor and give me a ride?
—__________.
| A．Yes, that's right |
| B．No trouble |
| C．Never mind |
| D．With pleasure |
He felt so proud as the audience were shouting loudly __________ his performance.
| A．to applaud |
| B．applauding |
| C．cheering |
| D．to cheer |
The river forms the __________ between the heavy industrial and light industrial areas of the city.
| A．division |
| B．gap |
| C．separation |
| D．interval |
Measures have been taken __________ the spread of the HIV.
| A．arresting |
| B．arrested |
| C．to arrest |
| D．for arresting |
In __________ preparation for Shenzhou If, scientists need __________ knowledge of weather changes.
| A．the; the |
| B．a; / |
| C．/; a |
| D．the; a |