题干
In a way，________global warming is a challenge for man，so we must overcome it to build________fine world.
A：the；/
B：a；the
C：a；/
D：/；a
答案(点此获取答案解析）
D
In a way，________global warming is a challenge for man，so we must overcome it to build________fine world.
A：the；/
B：a；the
C：a；/
D：/；a
