There many changes to Beijing over the past years.A. areB. haveC. has beenD. have been

问题补充：

There many changes to Beijing over the past years.

A. are

B. have

C. has been

D. have been

答案：

A. are

B. have

C. has been

(答案→)D. have been

解析：There be句型表示“某地(或某时)存在有某人(或某物)，而并非某地(某人、某物或某时)拥有什么东西”，句中有若干个名词作主语，动词be常与后面主语中的第一个名词在数上一致。have一般表示某人有某物。句意：在过去几年中，北京发生了许多变化。结合语境可知本句描述的是现在已经完成的动作，本句主语many changes表达复数含义，故选D。