His sister left home in 1998, and _______ever since.
| A．has not heard from | B．had not heard from |
| C．has not been heard of | D．had not been heard of |
The boy wanted to ride his bicycle in the street, but his mother told him _______.
| A．not to | B．not to do | C．not do it | D．do not do |
We agreed _______ here but so far she hasn’t turned up yet.
| A．having met | B．meeting | C．to meet | D．to have met |
—You were brave enough to raise objection at the meeting.
—Well, now I regret _______ that.
| A．to do | B．to be doing | C．to have done | D．having done |
The first textbooks _______ for teaching English as a foreign language came out in the 16th century.
| A．having written | B．to be written | C．being written | D．written |
Apartments in cities can be quite high. Renters are paying up to $1,000 per month for _______ bedroom apartment.
| A．one a | B．the one | C．one | D．a one |