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

Random Topics:
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 › ViewHe wanted ___ the whole truth.
A. to know
B. know
Present Perfect Tense › View
Have you … the bike?
A. repair
B. repaires
C. repairing
D. repaired
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
