當我們學習累了的時候，特別是做聽力題累了的時候，大家可以設著研究一下雅思聽力考試的設置和答案，其實里面有我們高中學的排列組合規律。

Choose THREE answers from the box and write the correct letter, A-D, next to questions 11-13.

A. the blue team

B. the yellow team

C. the green team

D. the red team

11. checking entrance tickets _______

首先出來的是red team,后面補充說we've also put the entrance staff on the red team and you'll be stamping the entrance tickets.

然后出現的是yellow team，后面補充說distributing tickets and staffing the information booths around the conference centre.

又出現blue team，前面說到chefs among you and the kitchen hands.

最后出現green team，后面補充到monitoring and directing the traffic in the car parks.

12. YELLOW(wrong)

13. BLUE(wrong)

正確率：33.33%

PLAN B:

13. GREEN

正確率：66.67%

PLAN C:

11. RED

11. YELLOW(wrong)

12. BLUE

13. GREEN

正確率：66.67%

根據這幾種情況我們可以看的出，三道題目全部答錯的概率是0，只答對一道題目的概率是25%，答對兩道以上題目的概率是75%。所以你即使完全聽不懂的話，你也至少可以答對一個題（前提是你要去聽，至少能聽懂紅黃藍綠，并且懂得雅思題目是遵循順序原則的）。