During her childhood Susan read a lot about Chinese history, from which she _________ greatly in her work in China now.
| A．observes | B．recovers | C．recognises | D．benefits |
. The person we referred to____ us a report tomorrow．
| A．giving | B．will give | C．gave | D．give |
The person we spoke to ____ no answer at first．
| A．making | B．makes | C．make | D．made |
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 |