Time and tide wait for none (a) —, no one can stop the onward march of time. (b) — we should not waste a single moment in vain. (c) — we should make the proper use of every single moment of our life. (d) — the students should understand the value of time. It is a matter of great regret that some of the students pass away their valuable time in facebook. (e) — they kill their time. (f) — they cannot prepare their lessons well. (g) — they always have a poor preparation for the examination. (h) — they cannot do well in the exam. (i) — they do not stop wasting time. (j) — they continue to waste their time using cell phone and facebook till it is too late for them.