— They have discussed the problem for hours.
— Have they come to any_____?
| A．end | B．result | C．conclusion | D．Opinion |
You can never imagine what great difficulty I have _____ your house.
| A．found | B．finding | C．to find | D．for finding |
Before he went abroad, he spent as much time as he ____ English.
| A．could learning | B．learned | C．to learn | D．could learn |
Mr. Wang made up his mind to devote all he could ____ his oral English before going abroad.
| A．improve | B．to improve | C．improving | D．to improving |
It was quite a serious accident, _________ caused by careless driving.
| A．which I think was | B．I think which was |
| C．which I think it was | D．I think which it was |
Jane was disappointed that most of the guests______ when she_______at the party.
| A．left; had arrived | B．left; arrived |
| C．had left; had arrived | D．had left; arrived |