【題目】The ever-growing space explorations mean that more astronauts ______.

A.requireB.was requiredC.requiredD.are required

【答案】D

【解析】

句意：日益增長(zhǎng)的太空探索活動(dòng)意味著需要更多的宇航員。

本題主要考查一般現(xiàn)在時(shí)的被動(dòng)語(yǔ)態(tài)。根據(jù)句意，日益增長(zhǎng)的太空探索活動(dòng)意味著需要更多的宇航員。在該句由 that 引導(dǎo)的賓語(yǔ)從句中，其主語(yǔ)為 astronauts（宇航員），宇航員是太空探索活動(dòng)中被需要的對(duì)象，故使用被動(dòng)語(yǔ)態(tài)。同時(shí)，主句謂語(yǔ) mean 為動(dòng)詞原形，可推斷主句時(shí)態(tài)為一般現(xiàn)在時(shí)，故從句時(shí)態(tài)也為一般現(xiàn)在時(shí)。故正確答案為D。

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