6. instruct-verb-dạy-His job is to instruct people in the use of the gym equipment.

    instruction-noun-sự dạy dỗ-The instruction couldn't have been more painstakingly detailed if we were leaving a critically ill infant in her care. 

    instructor-noun-ngưởi giảng dạy-They became the instructors and guides of their children. 

7. memory-noun-trí nhớ-I do have a vague memory of meeting her many years ago.

    memorize-verb-ghi nhớ-The exercises are also very superficial and focus on what can be memorized.

     memorial-adj-để kỷ niệm-The chapel was raised as a memorial to her son.

8.   refer-verb-tham khảo-If I'm not sure how to spell a word, I refer to a dictionary.

      reference-noun-sự tham khảo-She made a veiled reference to her former employer.

9.   silent-adj-yên lặng-The empty house was completely silent.

      silence-noun-sự tĩnh mịch-A loud crash of thunder broke the silence of the night.

      silently-adv-mang tính yên tĩnh-She wept silently into a handkerchief.

10. simple-adj-giản dị-He leads a very simple life.

     simplify-verb-đơn giản hóa-He tried to simplify the story for the younger audience.

     simplicity-noun sự giản dị-They failed to assess the importance of avoidance and took too rosy a view of the simplicities of ending evasion.

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