It is the duty of every citizen to make the country rich and powerful (To make the country rich and strong is…)。 In order to accomplish this object one must be patriotic (love his country)。 I consider this an unchangeable truth.
How can a student love his country (be patriotic)? I find my answer very simple and clear. He must study hard and store up knowledge so as to serve his (the) country in the future. If every student can do according to what I said, the country will certainly be rich and powerful.