I don’t know who invented ________ telephone. It’s really ________ most useful invention.
| A．the; a | B．/; a | C．a; the | D．/; the |
Professor Smith is said _____ another important discovery in chemistry.
| A．having made | B．making | C．to have made | D．to make |
I _____ the truth of your remarks, although they go against my interests.
| A．cannot but admit | B．cannot but to admit |
| C．cannot but admitting | D．cannot help but admitting |
Many teachers were praised at the meeting, Mr. Zhou _____.
| A．including | B．being included | C．to include | D．included |
–Did you get your pay?
–Yes, I remember _____. But I forget the exact amount.
| A．paying | B．to be paid | C．being paid | D．having paid |
With lost of trees _____, the house is not easily found.
| A．to surround | B．surrounding |
| C．having surrounded | D．surrounded |