26. How many languages can the writer speak?

• The text states that the writer can speak English, French, and Spanish.
• Therefore, the answer is C. 3.

27. The writer has learnt Spanish

• The text mentions that the writer studied Spanish at high school and is still learning it at university.
• So, the answer is D. B and C.

28. Travelling may cause troubles if

• The text says, "Travelling to the country where the target language is spoken is very helpful, but if you cannot speak the language well enough you will certainly have troubles."  
• Hence, the answer is A. you cannot speak the language well enough.

29. The most important thing is

• The text concludes, "However, getting some knowledge of the language is the most important thing. Grammar and vocabulary should be mastered first."  
• Therefore, the answer is C. getting some knowledge of the language.