去掉偏旁，组成新字，再组词。
邀—____ ____ 跪—____ ____
蜗牛的身体分为____、____、____、____；壳上有螺纹；头上有____；腹足可以运动，并且会分泌黏液，把蜗牛粘在物体上，不容易掉下来。
We shouldn't be too crazy about learning English, ______ it is also too extreme to cancel English classes in schools.
—________
