题目内容


The citizens of Beijing are proud of _______ they have done to make Beijing a beautiful city.
A.thatB.whichC.whatD.how
C
考查宾语从句,what引导宾语从句,在宾语从句中做done的宾语,句意;北京的公民对他们为了是北京成为美丽的城市所做的感到自豪。选C。
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