试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
(sure)
Our programs 
daily opportunities for all learners to practice the language with native speakers.
参考答案
试题解析
句子缺少谓语。所以变sure为ensure确保。
句意：我们的课程确保所有学习者每天都有机会与母语为母语的人一起练习语言。