注意：此页面搜索的是所有试题
题目内容
（国家开放大学英语语法）
Please take every possible ( ) to ensure that our products reach the port of the destination on time.
A. precaution
B.discrepancy
C. caution
D.change
A. precaution
B.discrepancy
C. caution
D.change
参考答案
