23. I had expected to put on weight when I gave up smoking, but I did not put on.

• Correct answer: D. on.
  • "Put on" is a phrasal verb meaning to gain weight.

24. He skilfully managed to keep the aircraft on the runway.

• Correct answer: A. to keep.
  • We use the infinitive "to keep" to express purpose.

25. The college principal promised to look into the matter.

• Correct answer: D. to look.
  • "Promise to" is followed by the infinitive.

26. I wanted to buy it but it cost too much money.

• Correct answer: D. to buy.
• We use the infinitive "to buy" to express intention.

27. I want to thank my production team for all their support.

• Correct answer: D. to thank.
• Similar to question 26, we use the infinitive "to thank" to express intention.

28. I planned to apply to university, but I eventually decided to go to the local poly.

• Correct answer: A. to apply.
• "Plan to" is followed by the infinitive.

29. He pretended to concentrate on the board while his mind clearly drifted somewhere else.

• Correct answer: B. to concentrate.
• "Pretend to" is followed by the infinitive.

30. The mother felt tired, so the kids offered to help her with the dishes.

• Correct answer: B. to help.
• "Offer to" is followed by the infinitive.

31. She tried to be serious, but she couldn't help laughing.

• Correct answer: B. to laugh.
• "Can't help" is followed by the gerund (-ing form of the verb).

32. He tried to avoid answering my question.

• Correct answer: B. to answer.
• "Try to" is followed by the infinitive.

33. Have you finished washing your hair yet?

• Correct answer: C. washing.
• We use the gerund "washing" after "finish."

34. I've put off writing the letters so many times. I really must do it today.

• Correct answer: D. writing.
• "Put off" is followed by the gerund.

35. I can't bear seeing this dirty room.

• Correct answer: A. seeing.
• "Can't bear" is followed by the gerund.

36. Have you considered going to live in another country?

• Correct answer: B. to go.
• "Consider" is followed by the gerund or infinitive.

37. Cathy suggested going to the cinema.

• Correct answer: D. going.
• "Suggest" is followed by the gerund.