--You were brave enough to raise objections at the meeting.
---Well, now I regret____ that.
| A．to do | B．to be doing | C．to have done | D．having done |
How long have you __________ the army?
| A．joined |
| B．joined in |
| C．taken part in |
| D．been in |
He was filled with sadness as he watched her __________ the crowd.
| A．disappeared |
| B．disappear into |
| C．disappearing |
| D．disappeared into |
She will ________ an important meeting next week.
| A．join |
| B．take part in |
| C．join in |
| D．attend |
I was told that there were about 50 foreign students __________ Chinese in the school, most __________ were from America.
| A．study; of whom |
| B．study; of them |
| C．studying; of them |
| D．studying; of whom |
Before we got home, Jim __________ the big cake __________ six pieces.
| A．had separated; from |
| B．had divided; into |
| C．cut; down |
| D．joined; to |