What is the duality of the language？A．Letters and sounds.B．Sounds and symbols.C．Symbols an

What is the price of the suit？（英译中)

What is the main idea of the last paragraph of the passage？A．Change is unavoidable.B．The c

What is the advantage of photographing the skies？A．The cost of equipment needed is reduced

What is the role of the 3rd paragraph in the development of the topic？A．Introducing the is

Which of the following statements about language is NOT true？A．Language is a system.B．Lang

What is the source of the problem?