1 . ______ is often the case, elderly people find it hard to teach themselves new skills even if they are aware that learning is a lifelong process.

A．As

B．What

C．That

D．It

2 . 正如老子容智地说过，“千里之行，始于足下。”(写出课文原文，Lao-Tzu)(汉译英)

3 . _________ is often the case, students tend to be more enthusiastic about classes in which they can participate and interact. (用适当的词填空)

4 . 正如Lao-Tzu睿智的箴言所说的那样，“千里之行，始于足下。” (汉译英)

5 . ________ it suggests, in baseball this means that a batter is out after making three unsuccessful attempts to hit the ball. （用适当的词填空）

6 . _________ (值得注意的是) every subject matter was the main focus of the Impressionists’ works, _________ (与传统上欧洲艺术界占主流的历史题材画作大相径庭). (根据汉语提示完成句子)