[ Grammar ]
If we ……… littering, the environment will be polluted.
A. turn off
B. go on
C. go to
D. turn on

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Conditionals (0 - 1 - 2)Modal Verb, Passive VoiceComparisonsSimple and Continuous Present TenseModals and Active and Passive VoiceArticles and NounsTime ExpressionsSentence and FragmentComperative and SuperlativePersonal pronouns + possessive adjectives + Introgative pronounsOther quiz:
Grammar › ViewWhat is the preposition in the sentence?
Charles Schulz wrote 17,897 “Peanuts” comic strips in his lifetime.
A. in his lifetime
B. in
C. lifetime
D. his
Vocabulary › View
the percentage of extra money you get if you invest a sum of money or that you pay if you have borrowed that money
A. money
B. investment
C. interest rate
Tenses › ViewWhich one is NOT a type of Present Tense?
A. Simple Present
B. Present Continuous
C. Present Perfect
D. Future Perfect
Mixed General Quiz › View
A person who acts is an act___.
a. er
b. or
c. ar