The students were advised to try a different to solving the plex maths problem.
A. approach
B. means
C. method
D. way
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(答案→)A. approach
B. means
C. method
D. way
解析：句意：这些学生被建议尝试一个不同的方法解决复杂的数学问题。这四个单词都有“方法”的意思，但是搭配不同，approach和to doing搭配，means和method和of doing搭配，way和of doing或to do搭配，所以选A。