23. He thinks Tom is stupid because he talks with the American accent.
? That he is stupid.
? Because he talks with the American accent.

24. Tom likes Mr Roberts.
? Tom.
? Mr Roberts.

25. He teaches him science.
? Him = Tom.
? Science.

26. They often do experiments in the science lessons.
? Experiments.
? In the science lessons.

27. Robert loves travelling.
? Robert.
? Travelling.

28. At the age of ten he travelled to the North Pole.
? At the age of ten.
? To the North Pole.

29. The base camp was in Canada.
? The base camp.

30. They walked for four days to their final destination.
? For four days.
? To their final destination.

31. The temperature was -30°C.
? -30°C.

32. It snowed every day.
? it snowed.

33. They were well prepared.
? Well prepared.

34. They wore warm clothes and good walking shoes.
? Warm clothes and good walking shoes.