______ over and over again, but he still couldn’t understand.
| A．Having explained | B．Having been explained |
| C．Explaining | D．It had been explained |
.Nancy isn’t here. It’s my fault, I forgot all about ______ her.
| A．to telephone | B．telephoning | C．to telephone to | D．telephoning by |
Would you mind my ______ her to the party?
Would you mind not ______ to the party?
| A．being invited, invited | B．being invited, being invited |
| C．inviting, invited | D．inviting, being invited |
The decision was made ______ soon after the meeting was over. Who was made_____ the decision soon after the meeting was over?
| A．to know, known | B．known, to know | C．known, known | D．to know, to know |
.Not ______ beautiful, the building is ______ now.
| A．looking, being built | B．looked, being built |
| C．being looked, building | D．looking, built |