[ Vocabulary ]
HYGIENE
A. MEASURES CONTRIBUTING TO CLEANLINESS AND OOD HEALTH
B. TO BEGIN OR PUT INTO PRACTICE
C. SO GRADUAL AS TO NOT BECOME APPARENT FOR A LONG TIME

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Past Continues TensePresent Simple TenseSubordinating ConjunctionsMaritime Vocabulary and GrammarVerb ConjugationAdverbs, Modals, Preposition of timeProgressive Verb TensesNountoo / enoughZero ConditionalOther quiz:
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a. knot
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Have you … really strange or interesting food?
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