【单选题】Choose correct answers to the question: Sign has become a scientific hot button. Only in the past 20 years have specialists in language study realized that signed languages are unique—a speech of the ...
A.
sign language was not extensively used even by deaf people
B.
sign language was too artificial to be widely accepted
C.
a language should be easy to use and understand
D.
a language could only exist in the form of speech sounds
【单选题】________ is a further development of CLT. It shares the same beliefs, as language should be learned as close as possible to how it is used in real life.