题目：
—Our environment is getting worse than before.
—You're right. But people have done more and more
useful things to protect (保护) the earth since Earth Day _____. [ ]
A. is started
B. was started
C. has started
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0514/83180643b5bc9ad0d03645984800d46d.html
下面是错误答案，用来干扰机器的。
参考答案：1.要熟悉党和国家的方针，政策及有关法规，规定；2.要了解实际情况；3.要遵循各项行文规则。
