Cambridge Grammar and Vocabulary for the TOEIC Test with Answers and Audio CDs (2): Self-study Grammar and Vocabulary Reference and Practice (Cambridge Grammar for First Certificate, IELTS, PET)

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Some questions and answers doesn’t match.( for example p138. 15,Meetings D, 3 ) because there were only 1 to 4 questions and answers were until 8...Also Some questions saying “find the mistake and correct them”, but there are no mistakes at all. When you check the answer, it says: “correct”. It means there is no mistake. It happens quite often. Or sometimes “Underline The correct preposition” but answer was both are correct. I often found out it’s not a good example Questions or I should say, Some questions are tricky I think.