Travelling to conferences，lectures，workshops，and the like frequently by plane _________ as important for scientists to get together and exchange information.（　?。?/h1>

A．was viewed

B．is viewed

C．has viewed

D．is viewing

【答案】B

【解答】

【點(diǎn)評(píng)】

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發(fā)布：2024/5/27 14:0:0組卷：16引用：1難度：0.5

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A．believed	B．is believed
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Travelling to conferences，lectures，workshops，and the like frequently by plane _________ as important for scientists to get together and exchange information.（ ?。?/h1>