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 |
________ we had read your letter _____the true state of affairs.
|
A．It was until… that we understood |
B．It was not until…that we understood |
|
C．Until …did not we understand |
D．Not until… we understood` |
Books of this kind well.
|
A．sell |
B．sells |
C．are sold |
D．is sold |
