【C4】A．attendB．participateC．studyD．belong

I（)English for about ten years.A、have studiedB、studiedC、studyD、have study

【C13】A．attendB．finishC．leaveD．enjoy

【C4】A．attendB．are attendingC．will attendD．were attending

【C7】A．studyingB．studiedC．studyD．studies

A. recoveryB. developmentC. studyD. growth

【B15】A．observedB．examinesC．studyD．questioned