[单选题]Teachers should make clear the relationship between grammatical form and _______function. ()cc7答案窝(daanwo.com)-大学生作业答案及考资分享平台 Acreativecc7答案窝(daanwo.com)-大学生作业答案及考资分享平台 Bperformativecc7答案窝(daanwo.com)-大学生作业答案及考资分享平台 Cexpressivecc7答案窝(daanwo.com)-大学生作业答案及考资分享平台 Dcommunicative