单选题The climate change confer

单选题 The climate change conference has come to __________ end, but the developing countries are dissatisfied with __________ small step that the developed countries have taken to reduce the emission(排放) of water gases.A.不填， aB.不填， theC.an , aD.an, the

D解析come to an end 固守词组。small step 后有一个定语从句，所以要用the。

我明天再问问老师，叫他解释下这个问题