阐述弱视的分类？
参考答案：
轻度弱视：矫正视力0.6~0.8，中度弱视：矫正视力0.2~0.5，重度弱视：矫正视力≤0.1。
Everything ________ into consideration，they ought to have another chance.[ ]
A．to take
B. taken
C．to be taken
D．taking
