单项选择题
A．that the municipal authorities have done
B．how those the municipal authorities have done
C．how what the municipal authorities have done
D．that how the municipal authorities have done
单项选择题 While he was not dumber than an ox, he was not any smarter; so most of his classmates were lenient and helped him along（）
单项选择题 The English vocabulary is known for a (an) （）of words which are comparatively seldom used in ordinary conversations．
单项选择题 The newly elected leader has declared his intention of cleaning（）the civil administrative organs.