The employees（）that they should renew their contracts within a week.
| A． | advise | B． | have advised | C． | are advised | D． | had been advised |
More and more Chinese people follow the practice ______ they will travel to various scenic spots to enjoy the scenery in their leisure time.
| A．whether | B．which | C．where | D．that |
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 |