If a TOEFL Listening question asks 'Why does the professor say X?', it tests:
AVocabulary
BSpeaker's purpose / function of statementCORRECT
CGrammar
DPronunciation
TOEFLListening
AI
Toaster Teacher
Why the answer is B, and why the others tempt you.
Function questions assess the purpose or attitude behind a specific spoken statement (often replayed).
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