BEC tests held ______ a year, in May and November.
查看答案
BEC tests have three levels:______ ______ ______ .
BEC tests asses your ability from four aspects:______ ______ ______ ______ .
3The term BEC is the representation of______ or ______ .
What is BEC examination designed for?______
微信支付 
支付宝支付