脆弱性是未被满足的安全需求，威胁要利用脆弱性来危害资产，从而形成风险。()

A. It would be on sale again.
B. It would be pulled down.
C. It had been redecorated.
D. It had been emptied.

A. They felt sorry and hardly recovered.
B. They felt relieved but with little regret.
C. They enjoyed their daily lives all the same.
D. They were depressed but tried to adjust themselves.

A. in charge of
B. in terms of
C. in case of
D. in favor of

A. valuable
B. invaluable
C. worthy
D. worthwhile