Itwasnotuntil1911,thefirstvita

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It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．

A．when; which

B．when; that

C．that; which

D．that; that

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A．Honest speaking	B．Honestly spoken
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A．to buy, left

B．to buy, leave

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A．to telephone

B．telephoning

C．to telephone to

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Would you mind not ______ to the party?

A．being invited, invited	B．being invited, being invited
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