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English class. Grammatical categories Verb Tenses and Aspects

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Image of a blackboard with mathematical expressions written on it

plant Pumpkin ovary under light mircoscope with white background

Laboratory Chemicals and equipment

An array of medical tools and equipment is displayed on a wooden surface and pictured from above.

First aid kit on a green table.

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English class. Grammatical categories Verb Tenses and Aspects

Mathematical formula on blackboard

Apple drawn in chalk on a greenboard. Healthy food, vegetarian nutrition, vitamin diet

plant rape flower cross section under light mircoscope with white background

Cross-section Dicot, Monocot and Root of Plant Stem under the microscope for classroom education.

Maths problem at a rather run-down green-board, written in chalk

Dicot plants stem show plant vascular tissue under light microscope view for botany education.

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Phonetic and phonemic transcription of any language English class lesson learn

Pain relief medication on desk

Medicine and stethoscope placed on the doctor's desk health care medicine..

corn stem micrograph with dye

Titanium and symbol structural formula chemical on the blackboard, Chemistry in the classroom

A blackboard filled with formulas and equations

Home healthcare and telehealth

Old golf scorecard

Blackboard with mathematical formula written with chalk

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Leiden leaf c.s. under microscope

Medical bottles with pills on the table

Learn english grammar. Chalkboard, school class lesson

Some partially filled Centrifuge tubes sit on a rack in a medical office.

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1926年，英国工部局在英租界举行Grammar School奠基仪式.jpg

1939 Tientsin Grammar School.jpg

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