用approach/way/means/method及其短语完成句子。

1. Learning a foreign language is _____ the study of the spoken language.

    学习外语最好的途径是学习口语.

2. We should____with great care.

    我们应该非常慎重地处理这个问题.

3. ____the palace were guarded by troops.

    通往宫殿的所有道路都有军队守卫.

4. As you know, there are several ways of ___.

    正如你了解的,有几种解决这个问题的途径.

5. The shadows lengthened with ___.

    阴影随着太阳的下落在拉长.

6. _____ when we must think  about buying a new house.

   我们一定思考买房子的时机即将来临.

下列哪味药不是祛风湿强筋骨药（）

A.五加皮

B.桑寄生

C.狗脊

D.千年健

E.蕲蛇