注意：此页面搜索的是所有试题
题目内容
（石家庄职业技术学院公共英语）
But as the amount of data and the demand for them , these electronic highways have become clogged. The solution: fiber optic.
A. are increasing
B. increased
C. have increased
D. would have increased
A. are increasing
B. increased
C. have increased
D. would have increased
参考答案
