The machine has been used many years_____ it doesn’t work well occasionally.
| A．That’s because | B．It’s no wonder that |
| C．There’s no doubt if | D．It’s unlikely that |
Do you think the reason_______ you gave for your absence is reasonable?
| A．as | B．what | C．that | D．why |
Mr. Bob, ______ as a manager for many years, found it hard to be an ordinary clerk again.
| A．having worked | B．worked | C．to have worked | D．working |
How frequently _______, the works of Shakespeare always attract many people.
| A．performed | B．performing | C．being performed | D．to be performed |
The topic___________ a heated discussion.
| A．set off | B．set out | C．set down | D．set for |
The car ran into a crowd of middle school students, ______to hospital immediately.
| A．two of whom sent | B．two of them sent |
| C．two of whom are sent | D．two of them sending |