Susan decided not to work on the program at home because she didn’t want her parents to know what she .
| A．has done | B．had done | C．was doing | D．is doing |
Be careful when you surf the Internet．If you download a virus into your computer ______, you will not open your files．
| A．on purpose | B．by accident | C．at random | D．on average |
The news that Shenzhou VII returned to the earth successfully _____ throughout the country．
| A．stretched | B．expanded | C．extended | D．spread |
With so much noise of the traffic, I couldn’t ______ and do my research work．
| A．put down | B．settle down | C．break down | D．take down |
On this important feast day, people eat food in the ______ of skulls and cakes with “bones” on them．
| A．form | B．shape | C．way | D．light |
While in university, we were offered a number of afterschool activities to _____ our social skills．
| A．create | B．grow | C．develop | D．settle |