23. Every time Parkas sees a movie made in India, he ... homesick.

• Answer: C. feels
  • The present simple tense is used to express habitual actions. "Feels" is the correct form to express a regular feeling.

24. I can't help you with your homework tonight, ... shopping.

• Answer: B. I'm going
  • The present continuous tense is used to express actions happening at the present moment. "I'm going" indicates that the person is currently going shopping.

25. Since I left Venezuela six years ago, I ... to visit friends and family several times.

• Answer: D. have returned
  • The present perfect tense is used to express actions that started in the past and continue up to the present. "Have returned" indicates that the person has returned multiple times since leaving Venezuela.

26. Linda has lost her passport again. It's the second time this ...

• Answer: A. has happened
  • The present perfect tense is used to express actions that have happened multiple times in the past. "Has happened" indicates that this has happened twice.

27. She usually ... skirt. But today she ... trousers.

• Answer: A. wears/is wearing
  • The present simple tense is used to express habitual actions. "Wears" indicates that she usually wears a skirt. The present continuous tense is used to express actions happening at the present moment. "Is wearing" indicates that she is wearing trousers today.

28. I'm busy at the moment. ... on the computer.

• Answer: C. I'm working
  • The present continuous tense is used to express actions happening at the present moment. "I'm working" indicates that the person is currently working on the computer.

29. For the past few years, I ... a lot of things.

• Answer: C. have done
  • The present perfect tense is used to express actions that started in the past and continue up to the present. "Have done" indicates that the person has done a lot of things over the past few years.

30. The Smiths ... to the cinema tonight.

• Answer: A. are going
  • The present continuous tense is used to express future plans. "Are going" indicates that the Smiths are planning to go to the cinema tonight.

31. I haven't seen him ...

• Answer: C. for many years
  • The present perfect tense with "for" is used to express actions that started in the past and continue up to the present. "For many years" indicates that the person has not seen him for a long time.

32. A cold wind ... for the last three days.

• Answer: A. has been blowing
  • The present perfect continuous tense is used to express actions that started in the past and are still continuing. "Has been blowing" indicates that the cold wind has been blowing for the last three days.

33. For years, scientists in many countries ... a lot of research to find a vaccine against AIDS.

• Answer: D. have done
  • The present perfect tense is used to express actions that started in the past and continue up to the present. "Have done" indicates that scientists have been doing research for many years.