Sam _____ some knowledge of the computer just by watching others working on it. 

Maintaining (维持) peace and stability of the South China Sea and the East China Sea will certainly ____ a more prosperous Asian-Pacific area.

The suggestion, ____ by the locals, proved to be a very constructive one.

The discovery of the new drug is of great ____ to people who suffer from heart problems.

——Does Callum have a new camera?     ——Yes. In fact, it is quite similar ______ yours. 

Sarah, hurry up or you won’t have time to ______ before the party. 

.Before she came to England, she had never heard a single English word ___________.

I have had my bike _____, and I'm going to have somebody______ my radio tomorrow.

I       sight of an empty seat at the back of the bus and went directly there. 

In the traffic accident, his father came close to________ .

 David had prepared carefully for the chemistry exam, as he wanted to be sure of passing it at the first _____.

They became good friends during the war, and since then their lifelong friendship has _______ tests of life and death.

As you get older, your _______ towards the matter will change.

You can’t imagine what difficulty we had            home in the snowstorm.

—Have you           some new ideas?—Yeah. I’ll tell you later.

.Ten minutes later，a bus ______ and everybody got on it.

The Chinese University of Hong Kong, founded in 1963, ______ 50 in 2013.

We did have a quarrel about money last night, but now we have already _________.

—I heard that Mary had ________ with her friend. —Really? No wonder they don’t speak to each other any longer.

He had a headache and went to the chemist's to get something for his pain________.