[ Grammar & Vocabulary ]
Using eco-friendly cleaning products helps protect the environment from ______ substances.
A. harmful
B. helpful
C. healthy
D. active

Random Topics:
Conditional Sentences Type 1Zero ConditionalLexico and GrammarGerunds and InfitinitivesComparative AdverbsTenses with Time ExpressionsMixed GrammarConjunctivesSimple Past - Irregular VerbsModals of ProbabilityOther quiz:
Grammar › View– ……………… colour is the symbol of luck for the Hoa people?
– Red (is).
A. What
B. Which
C. Who
D. Whom
Tenses › View
Formulate a question in the past continuous tense.
A. What were you doing yesterday?
B. What did you eat last night?
C. What is your favorite color?
D. What will you do tomorrow?
Grammar › ViewNow, the committee members … the whole material from all the attendants.
A. examined
B. examines
C. have examined
D. are examining
Punctuation › View
Which of the following does the contraction “would’ve” take the place of?
A. would of
B. would have
C. will of
D. will have
