[单项选择]An iron and steel works, with several satellite factories, ______ in that city now.
A. is built
B. is being built
C. were built
D. are being built

[单项选择]An iron and steel works, with several satellite factories, ______ in that city now.
A. is built
B. is being built
C. were built
D. are being built

[单项选择]Steel works are encouraged to purchase ______ iron so as to reduce the consumption of natural resources.
A. scrap
B. scrape
C. scratch
D. snap

[单项选择]Pigiron, wrought iron, and steel contain iron carbides made up of ______ of carbon.
A. (amounts are different
B. ( different amounts that
C. ( different amounts
D. ( which amounts are different

[单项选择]Aboutof the workers in that steel works are young people.
A. thirdfifth
B. thirdfifths
C. threefifth
D. threefifths

[多项选择]The Schuyler and Livingston Iron Works has been working on getting its network security under control.It has set up VPN with IPSec links to its suppliers. It has installed network vulnerability scanners to proactively identify areas of weakness, and it monitors and responds to security events as they occur. It also employs extensive access control lists, stateful firewall implementations, and dedicated firewall appliances. The company has been growing very fast lately and wants to make sure it is up to date on security measures. Which two areas of security would you advise the company to strengthen?（）
A. intrusion protection
B. identity
C. secure connectivity
D. security management

[单项选择]The wrongly-designed iron-steel bridge was finally
A. shipped away
B. sold at a low price
C. made into many rings
D. used again after repairing

[单项选择]Iron and steel are flexible. But they are not as flexible ______ rubber.
A. as
B. to
C. for
D. by

[单项选择]Steel is an alloy composed （） of iron and carbon.
A. primarily
B. traditionally
C. carefully
D. partially

[单项选择] ____ is rooted in experiments in iron and steel conducted in the nineteenth century.
A. While the history of twentieth-century architecture
B. The history of twentieth-century architecture
C. That the history of twentieth-century architecture
D. Both twentieth-century architecture and its history

[单项选择]Iron and steel expands when heated and ______ when cooled.
A. shrinks
B. contracts
C. condenses
D. compresses

[单项选择]Steel is an alloy composed ______of iron and carbon.
A. primarily
B. traditionally
C. carefully
D. partially

[单项选择]At present, there is a ______ of iron and steel and more must be produced.
A. Limit
B. loss
C. poverty
D. scarcity

[单项选择]Dawson was dissatisfied with soft iron pitons because ______. ( )

[单项选择]The hill was once rich with iron.
A. abundant
B. destitute
C. enough
D. sufficient

[单项选择]Who works in the bookshop
A. Miss Smith.
B. Mr. Hunt.
C. Mr. King.
D. Mr. Brown.

[单项选择]If Google IPO works,
A. a recovery in equity prices will end.
B. the IPO market will be propelled by it.
C. many U.S. firms will purchase new equity.
D. a sustained economic growth will take place.

[单项选择]Which of the following statements about iron is true
A. It arrives occasionally in the form of meteorites.
B. It is regarded as a gift from the gods.
C. It is regarded as heavenly element.
D. It tarnishes as slowly as gold.

[单项选择]A shift from native bronze to iron artifacts took place under the influence of cultural borrowings.
A. transition
B. transmission
C. transaction
D. transference