She avoids to go out alone at night. (Improve)

• A. avoids going (Answer)
• B. avoids to going
• C. avoid to go
• D. No improvement

'Avoid' is always followed by a gerund (verb+ing), never a to-infinitive.

He succeeded to pass the examination. (Improve)

• A. succeeded passing
• B. succeeded in passing (Answer)
• C. succeeded to passing
• D. No improvement

'Succeed in + gerund' is the correct structure.

The children are interesting in the story. (Improve)

• A. interested in (Answer)
• B. interesting about
• C. interested about
• D. No improvement

'Interested in' describes a person's feeling. 'Interesting' describes the thing that causes the feeling.

He is habitual of waking up late. (Improve)

• A. has a habit to wake
• B. is in the habit of waking (Answer)
• C. has habitual of waking
• D. No improvement

'Be in the habit of + gerund' is the correct structure. 'Habitual' is an adjective, not used this way.

I look forward to see you next week. (Improve)

• A. look forward to seeing (Answer)
• B. looking forward to see
• C. look forward seeing
• D. No improvement

'Look forward to' is followed by a gerund (seeing). 'To' here is a preposition, not part of infinitive.

The book that I bought it yesterday is very interesting. (Improve)

• A. that I bought yesterday is (Answer)
• B. which I bought it yesterday
• C. that I had bought it yesterday
• D. No improvement

The pronoun 'it' is redundant in a relative clause. Remove 'it'.

No sooner did he arrive than the guests had started leaving. (Improve)

• A. started to leave
• B. started leaving (Answer)
• C. No improvement
• D. start leaving

'No sooner...than' uses past tense in both clauses. 'Had started' is incorrect.

He was too tired to can walk another mile. (Improve)

• A. too tired to walk (Answer)
• B. so tired to walk
• C. too tired that he walked
• D. No improvement

'Too + adj + to + bare infinitive' is the correct structure. 'Can' after 'to' is incorrect.

She is elder than her sister by two years. (Improve)

• A. older (Answer)
• B. eldest
• C. oldest
• D. No improvement

'Older/younger' are used in general comparisons. 'Elder/eldest' are used within the family context, but 'older' is also acceptable for people.

The Principal gave the award to Ravi and I. (Improve)

• A. Ravi and me (Answer)
• B. Ravi and myself
• C. me and Ravi
• D. No improvement

After a preposition ('to'), use objective case 'me', not nominative 'I'.