Travelling in space has been made __________ possible with the development of science and technology.
A．thatB．/C．itD．this
B

試題分析：考查被動(dòng)語態(tài)。本題是一個(gè)被動(dòng)語態(tài)的形式，其主動(dòng)形式為：With the development of science and technology, we have made travelling in space possible.隨著科技的發(fā)展，我們讓太空旅游變得可能。
點(diǎn)評(píng)：被動(dòng)語態(tài)要根據(jù)句子的意思來判斷。本題要特別注意it用法。英語中的it是一個(gè)形式主語或者形式賓語，可以代替真正的主語和賓語。
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