It will take a long time for the effective use of natural resources _________.
A．to be madeB．to makeC．being madeD．making
A

試題分析：考查不定式的用法：句意：實(shí)現(xiàn)天然氣的有效使用花了很長(zhǎng)時(shí)間。原句可改為：To make the effective use of natural gas took a long time.這里使用的是It will take +一段時(shí)間+to do sth，不定式是這句話的主語，it是形式主語，而且the effective use of natural resources和make是被動(dòng)關(guān)系，選A。
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