【单选题】In the late nineth and early twentieth centuries, one of the most clearly visible difficulties 【C1】______ teachers in New York schools had to 【C2】______ was how to teach children who did not speak...
【单选题】What do we mean by a perfect English pronunciation? In one【C1】______there are as many different kinds of English as there are speakers of it.【C2】______two speakers speak in exactly the same【C3】______W...