Read the following passage and mark the letter A, B, Cor D to indicate the correct word that best fits each of the numbered blanks from 26 to 30.

Last Friday, Ms Mabel brought her class for an excursion to the fire station. She wanted her students to see and learn how things were run inside the red brick building and what the firemen had to do (26) ________ emergencies. She introduced them to Mr Jackson, the chief of the fire department.

Before Mr Jackson showed the students around the fire station, there was a short (27) ________ between the students and him. He wondered how much the students knew about the occupation. The students were only too eager to show off what they knew or learnt from school about firemen. It was evident that they were (28) ________ to find out more about what firemen do besides extinguishing fires and rescuing people. Mr Jackson told them a fireman had to (29) ________ many tests before he could be certified as a professional. In addition, a fireman must be strong and physically fit.

At last, Mr Jackson brought the eager students to look at the fire engines. He (30) ________ out to them the hydraulic platform on the fire engine which they use to put out fires in flats or other high-rise buildings.