[ Vocabulary ]
the ability to be maintained at a certain rate or level
A. energy conservation
B. human impact
C. renewable resources
D. sustainability
E. availability

Random Topics:
Articles & Compound NounsAction vs Linking Verbs/ Verb PhrasesVerb AgreementLinking Words and PhrasesSimple Past ContinuosTenses and QuestionsReflexive Pronouns & Modal VerbsTypes of PhrasesPreposition of PlaceVerbsOther quiz:
Vocabulary › ViewIf something is described as being clearly stated or shown with no room for confusion, it is said to be:
A. Immediate
B. Explicit
C. Professional
D. Devastated
Modal Verbs › View
They live in a very big house.They____be rich.
A. must
B. may
C. have
D. should
Grammar › ViewChoose the sentence that is written correctly.
A. I am remembering your face!
B. I remember your face!
C. I am remember your face!
Grammar › View
When Paul was at my flat yesterday, he asked if he _______________ use the phone.
A. can
B. could
C. may
D. must
