Experts have found that the disease will lead to a greater increase in the number of sufferers unless ________ seriously when the symptom first appears.
| A．treated | B．to be treated |
| C．being treated | D．be treated |
Alexander Grantham Bell invented ____ telephone in 1876.
| A．不填 | B．a | C．the | D．one |
—You were brae 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 |
The lady said she would buy a gift for her daughter with the ___.
| A．20 dollars remained | B．20 dollars to remain |
| C．remained 20 dollars | D．remaining 20 dollars |
. When I get back home, I saw a message pinned to the door. __ “sorry to miss you; I will call tater.”
| A．read | B．reads | C．to read | D．reading |
The picture _____ on the wall is painted by my son.
| A．having hung | B．hanging | C．hangs | D．being hung |