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【題目】If people________polluting the air, animals and plants will die soon.

A. didn't stop B. don't stop C. haven't stopped D. shall not stop

【答案】B

【解析】

句意：如果人們不停止污染空氣，動植物很快就會死去�？疾橐话悻F在時。由題干可知本句是if引導的條件狀語從句，主句用一般將來時，從句用一般現在時表示將來。結合選項可知B選項符合題意，故答案選B。

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