I should convey my appreciation to my high school teachers, without ____ help I wouldn’t achieve such a big success.
| A．whom | B．them | C．which | D．whose |
Success belongs to those who work hard. I firmly believe that, _____my own efforts, I can make it.
| A．showing off | B．leaving out | C．relying on | D．making up |
David, _____ I have been sharing a dorm for more than two years, is quite a funny guy.
| A．of whom | B．with whom | C．in whom | D．from whom |
--The mistake_____, I had been more careful.
---But you weren’t at that time.
| A．might have avoided | B．would avoid |
| C．would be avoided | D．might have been avoided |
---Excuse me, is this seat______?
---yes. Go ahead.
| A．occupied | B．flexible | C．temporary | D．vacant |
China's first moon rover, Yutu, or Jade Rabbit touched the lunar surface at 9:14 a.m.on December 14,2013, ________deep trace on the loose lunar soil.
| A．left | B．leaving | C．Having left | D．To leave |