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__________ environmental damage is done, it takes many years for the ecosystem(生态系统) to recover.

A．Even if

B．If only

C．While

D．Once

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In some western countries, demand for graduates from MBA courses has __________.

A．turned down

B．turned over

C．fallen down

D．fallen over

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I arrived late; I ________ the road to be so icy.

A．wouldn’t expect	B．haven’t expected
C．hadn’t expected	D．wasn’t expecting

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Some countries are increasing their use of natural gas, and other forms of ________.

A．source

B．energy

C．power

D．material

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All the employees except the manager ________ to work online at home.

A．encourages

B．encourage

C．is encouraged

D．are encouraged

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–Which share is meant for me?
--You can take ________ half. They’re exactly the same.

A．this

B．any

C．each

D．either

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