[ 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:
Modals › ViewA: Hopefully, Peter booked the tickets for us yesterday.
B: He ——- them yesterday. The booking office is closed on Saturdays.
A: Oh well, I’m sure he’ll order them tomorrow then.
A. had better not book
B. hasn’t booked
C. couldn’t have booked
D. needn’t have booked
E. wasn’t supposed to book
Present Continuous › View
Molly and I …………………… for our Maths test
A. are studying
B. studying
C. is studying
D. am studying
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