. It was the hardship _____ he experienced as a young man _____ made him what he is today.
| A．that; that | B．that; which | C．which; who | D．that; who |
--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 |
When you arrive at your job in the morning, let the first thing you say_____ everyone’s day
| A．to brighten | B．brightening | C．brightened | D．brighten |
The reason ______ Tom came to attend the meeting was ______ he was an expert in this field.
| A．why; that | B．why; whether | C．that; why | D．why; because |