Study sincerely lest ________. (Complete the sentences with suitable clause/phrase)

I miss my maternal grandmother a lot. 15 years have passed since  I last met her.

Zillur and Ashraf were lucky. No sooner had they  reached than they caught the bus.

In our country, there are many people  who are poor / lead their lives under poverty line. Poverty is a curse for any society.

Corruption is an obstacle to our national development. It is high time  to take action against corruption./ Government took necessary steps to stop corruption.

Nurjahan studies medicine so that   she can become a doctor and serve people.

Once there was an old man who had three sons. They were so lazy that  they couldn't work hard to earn their living.