16. Incorrect:- She has got through the examination but I am happy.
Correct:- She has got through the examination and I am happy.

17. Incorrect:- His uncle is a millionaire and his father is a pauper.
Correct:- His uncle is a millionaire but his father is a pauper.

18. Incorrect:- While in Rome, do like the Romans do.
Correct:- While in Rome, do as the Romans do.

19. Incorrect:- I asked him that why was he absent from the college.
Correct:- I asked hem that why he was absent from the college.

20. Incorrect:- Supposing if you fall, what will you do?
Correct:- Supposing you fall, what will you do?

21. Incorrect:- As you sow, that you will reap.
Correct:- As you sow, that you will reap.

22. Incorrect:- He was much tired that he could not walk further.
Correct:- He was much so tired that he could not walk further.

23. Incorrect:- The house is beautiful where he resides.
Correct:- The house where he resides is beautiful.

24. Incorrect:- He is such a man that no one likes.
Correct:- He is such a man as no one likes.

25. Incorrect:- Boys study because they may earn their livelihood.
Correct:- Boys study so that they may earn their livelihood.

26. Incorrect:- Such students will be allowed to appear at the interview who have passed BA examination.
Correct:- Such students those have passed BA examination will be allowed to appear at the interview.