[ Vocabulary ]
High levels of pollution can upset the ____________ of an ecosystem.
A. average
B. substance
C. reason
D. balance
Random Topics:
Adjectives & PrepositionsGerund - to Infinitive Gerund & InfinitiveSimple Present and Present Continuous TensesPrepositions and ArticlesPresent SimpleTypes of Simple SentencesPast Tense, Recount Text, and Future TenseGerunds + To InfinitiveGrammar and Verb TensesOther quiz:
Es and S › View
He ………. at 7 o’clock.
A. gets up
B. gets dressed
C. wakes up
Tenses › View
He _______ to the gym every day.
A. go
B. goes
C. going
D. went
Past and Future Tenses › ViewYesterday, they ________ a delicious cake.
A. Will bake
B. Bakes
C. Baked
Adverbs of Manner › View
Rewrite the sentences using one of the adverbs.
The children laughed at the funny clown ______.
A. secretly
B. happily
C. badly
D. quietly