(a) Success comes to the diligent. It is high time our students became diligent.
(b) Time once lost is lost forever. All should utilize time properly, lest they should become unsuccessful in realizing their respective aim.
(c) Eve-teasing is one of the serious problems. It is an inhuman and barbarous act. We should create public awareness so that our girls can get rid of this evil/we can eradicate this curse from society.
(d) You bought me a sweater. But it was so large that I could not wear it/I looked strange in the sweater.
(e) Fools rush in where angels fear to tread.
(f) I entered the classroom. Everyone in the classroom stared at me as if I had made a great blunder/I had done something seriously wrong.
(g) I was optimistic about winning the game. I had practised a lot before I took part in the competition.
(h) He has been sacked from his job because of taking a bribe. There goes a wise saying "As you sow, so you reap."
(i) I don't have much power to punish the corrupt persons. Had I been the boss of the office, I would have eradicated corruption from it/I would have punished the corrupt people duly.
(j) I could not recognize you at first. It was five years since we had met in Khulna.