The theory he sticks to ______ to be of no use in our studies.
| A．proves | B．prove |
| C．proving | D．be proved |
The man you referred to _____ just now.
| A．comes | B．come |
| C．coming | D．came |
How happy we are! The holiday we have been looking forward _______ at last.
| A．to has come | B．to have come |
| C．to having come | D．has come |
You can never imagine what great difficulty I had ______ your house all by myself.
| A．found | B．finding |
| C．to find | D．for finding |
Who did the boss _____ his car this time?
| A．make wash | B．make to wash |
| C．make washing | D．making to wash |