【单选题】The Certificates in English Language Skills (CELS) are a set of standard tests that allow you to test in one or more of the four language skills, or combine tests at different levels. Tests are availa...
A.
GELS is able to be used for all kinds of tests
B.
CELS is suitable for the people all over the world
C.
GELS is made up of CELS Higher, CELS Vantage and CELS Preliminary