There are many obstacles in our way to success. We must work hard so that _______

I think you are irregular in studies. Be attentive lest you should fall behind in your class

Jamil had an accident yesterday while he was driving to work

There goes a proverb that  a man is known by the company he keeps So, we should make friendship with a gentleman.

Corruption is a bottleneck to our national development. It is high time  we took strong measures

He, who studies hard and remains dedicated, makes a glorious result in the examination.

Whenever he speaks in English,  he makes some mistakes Infact, we learn through mistakes.