A study ________ in the USA in 1977 showed that the chemical ASA in aspirin could prevent a stroke.
|
A．carrying out |
B． carried out |
C．working out |
D．worked out |
It’s obvious that the Beijing Olympic Games a great success．
A．kept B．showed C proved D．remained
Scientists ____ thousands of chemicals before they decided on the right one in the end.
|
A．tried out |
B．found out |
C．worked out |
D．turned out |
The deserted island is only _______ by boat.
|
A．suitable |
B．practical |
C．available |
D．accessible |
As is widely acknowledged, a great number of traffic accidents ____ numerous deaths and countless property loss all over the world every year.
|
A．depend on |
B．contribute to |
C．result from |
D．aim at |
To their great _____, Tom’s problem proved not to be as serious as they had feared.
|
A．happy |
B．worry |
C．anxiety |
D．relief |
