Tom kept quiet about the accident ________ lose his job.
| A．so not as to | B．not so as to | C．so as to not | D．so as not to |
Do you know ______________ had reported the accident to the police?
| A．who it was that | B．who was it that | C．it was who that | D．that it was who |
Passengers on board aren’t allowed _____ calls during take-off.
| A．making or receiving | B．having made or received |
| C．to have made or received | D．to make or receive |
During the 1960s, songs about winter ___________ by many famous rock groups were popular among people of different ages.
| A．released | B．being released |
| C．releasing | D．having been released |
__________ in the fields on a March afternoon, he could feel the warmth of spring.
| A．To walk | B．Walking | C．Walked | D．Having walked |
The Spring Festival is our traditional festival, __________ people usually visit their friends and relatives.
| A．for which | B．to which | C．during which | D．about which |