Thecountryhasalreadysentup3unm

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The country has already sent up 3 unmanned spacecraft, the most recent at the end of last March.

A．was launched	B．being launched
C．has been launched	D．having been launched

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—You seemed to be impressed by his skill.
—No. It was his courage ________ his skill that really impressed me.

A．but also

B．except for

C．as well as

D．rather than

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—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.

A．can; must

B．can; may

C．must; can

D．may; must

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Once harm is _______ to the eco-system, all species will ________, including man himself.

A．made; be in danger	B．done; be dangerous
C．caused; be endangered	D．done; be in danger

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The stamp on the letter is an art, from _______ we can get a lot of cultural knowledge.

A．whom

B．which

C．them

D．those

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It is believed that a new kind of drug ______ by the scientists and they are hopeful that they will succeed in a few months.

A．has been developed	B．is being developed
C．is developing	D．has developed

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