单选题：The word "its" in the second paragraph refers to__________.

题目内容：

The word "its" in the second paragraph refers to__________. A．the nerve's
B．the blood's
C．the eye's
D．the retina's

参考答案：

答案解析：

Many economists pointed out the fatal error for this crisis

Many economists pointed out the fatal error for this crisis.A．crucial B．puzzlin

分类：卫生类题型：单选题

A great deal has been done to remedy the situation.A．maintain B．improve C．preser

分类：卫生类题型：单选题

Jack packed up all the things he had accumulated over the last ten years.A．futur

分类：卫生类题型：单选题

Have you met Tom recently?A．shortly B．currently C．lately D．probably

分类：卫生类题型：单选题

Paragraph 3 __________.A．Necessity for developing adult education B．Early days o

分类：卫生类题型：单选题