[单选题] By _____ of taxation, we pay for things that we need just as much as we need something to eat.

1、[单选题]The current investment _____ in our country are favorable, so a lot of foreign investors have come.

• A、conditions
• B、weather
• C、situation
• D、state

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2、[单选题]Scientists have (  ) many new methods of increasing the world's food supply.

• A、put up with
• B、caught up with
• C、 brought up with
• D、come up with

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3、[单选题]Without tax, it would be（ ）to pay the soldiers and policemen.

• A、possible
• B、impossible
• C、probable
• D、easy

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4、[单选题]Although this book is very old,（　）content is very interesting.

• A、 its
• B、so it
• C、it is
• D、but its

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5、[单选题]The government of every country should (  ) great importance to environment protection.

• A、attach
• B、approach
• C、pay
• D、spend

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