Grammar Quiz

[ Vocabulary ]

High levels of pollution can upset the ____________ of an ecosystem.

A. average

B. substance

C. reason

D. balance

Select your answer:
         


Random Topics:

Article & PrepositionToeic VerbGerunds as objects of preposition3rd Person SingularConjunctionFuture TenseModals and Semi-ModalsFew, a few, little, a littleSentences vs Run-Ons

Other quiz:

Grammar › View

The exam _______________ nearly three hours.

A. lasted

B. was lasting

C. lasting


Simple Future Tense › View

My father………… (call) you in 5 minutes

A. calls

B. am calling

C. will call

D. is calling