It is only with the help of scientific research _____ bring PM1 air pollution under control.
A．that we willB．we will
C．that we doD．do we
A

試題分析：考查強調(diào)句結(jié)構(gòu)。強調(diào)句的結(jié)構(gòu)為it + be + 強調(diào)部分 + that從句。此題強調(diào)狀語only with the help of scientific research。句意：只有在科學(xué)研究的幫助，我們將PM1空氣污染得到控制。故A正確。
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