- 试题详情及答案解析
- --The Chinese government is trying to protect the giant panda.
--I know. By 2020, they _________ about 69,500 square miles of land to the country’s nature reserve system.| A．add | B．are adding |
| C．will add | D．will have added |
- 答案：D
- 试题分析：考查时态。by+时间，与完成时连用；by+过去的时间，句子使用过去完成时；by+将来的时间，句子使用将来完成时，by 2020表示将来的时间，故选D。
考点：考查时态