At present, in Zhong Kai High-tech Zone, Huizhou City, Guangdong Province, which publishing house and which year are the textbooks used for grade four English?
CET-4, abbreviation of CET-4. It is a national teaching examination sponsored by the Higher Education Department of the Ministry of Education. The main target of the examination is undergraduates or postgraduates who have completed CET-4 according to the syllabus. CET-4 is a public English level certificate.