We should read books to gain knowledge. (Make it complex)
We should read books for gaining knowledge
We should read books and gain knowledge.
We should read books so that we can gain knowledge
We want to gain knowledge and so we should read books
সঠিক উত্তর:
We should read books so that we can gain knowledge
ব্যাখ্যা ও নোট:
উদ্দেশ্যমূলক Simple বাক্যে (to + verb) থাকলে Complex করতে 'so that' বসে।