单项选择题

They took () measures to prevent poisonous gases from escaping.

A. fruitful
B. beneficial
C. valuable
D. effective

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We gave out a cheer when the red roof of the cottage came () view.

A. from
B. in
C. before
D. into

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Does everyone on earth have an equal right ()an equal share of its resources

A. by
B. at
C. to
D. over

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