[ Grammar ]
The safety officer warned the employees ______ protective gear when handling hazardous materials.
A. to wear
B. wearing
C. wear
D. worn

Random Topics:
Infinitives or GerundsConditionalPassive Voice in Past Simple TenseGrammar (Possessive Pronouns)Question tag and + - AgreementPrepositions and ConjunctionsParticiple Clauses & Cleft SentencesPresent Simple vs Past SimpleAction, Helping & Linking VerbsPresent Tenses and VocabularyOther quiz:
Grammar › ViewSomeone _________ the coffee.
A. Has finished
B. Has been finishing
Present Continuous Tense › View
I _____ my dinner right now.
A. eat
B. eating
C. am eating
D. eats