题目内容:
In__________drills,thestudentschangeagivenstructureinawaysothattheyareexposedtoothersimilarstructures,whichalsohelpsthemhaveadeeperunderstandingofhowthestructuresareformedandhowtheyareused. A.substitution
B.transformation
C.comprehension
D.communicative
参考答案:
答案解析: