题目:The total world population is now _______.
A. about 250 million
B. less than 5 billion
C. more than 5 billion
D. 20 times than 20,000 years ago
答案:评论后可见此内容
推荐使用我们的公众号搜索题目,题目更全,检索更方便。支持语音、图片、文字等多种搜索方式。