If you want to ask me why we should study English, my answer will be simple and clear. Now let me enumerate the reasons one by one in the following.
In the first place, English has become an international language. If you know English, you van make a trip round the world without being misunderstood.
In the second place, most valuable books, newspapers and magazines are written in English. If you wish (hope) to get knowledge, you must learn English.