[ Grammar ]
Burning yard waste releases mold spores, soot, and other contaminants that can aggravate allergies and cause ____ problems.
A. respirator
B. respiration
C. respiratory
D. respired
Select your answer:
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Common Grammar Mistakes and Spelling TipsConjunctionsVerb FormsCommasGrammar - Sentence StructureArticles & Compound NounsAdverbs of DegreePronunciation and VocabularyDirect-Indirect SpeechModals for Ability, Possibility and PermissionOther quiz:
Grammar › ViewDon’t stop ________. It’s not the time for lunch yet.
A. Working
B. To work
Vocabulary › View
After years of pollution, the soil showed signs of severe _____.
A. advent
B. degradation
C. asbestos
D. connotation