[ Vocabulary ]
Using renewable energy instead of non-renewable one is of the most effective ______ methods.
A. energy-saving
B. energy-saved
C. to-save-energy
D. saving-energy

Random Topics:
Grammar and VocabulariesCorrelative Conjunction & Complex SentencesPrepositionGrammar - Present and Past PassiveImperative SentencesSubordinating and Coordinating ConjunctionsAdjectives and ArticlesPast Perfect Tense and Past TenseVocabulary, Grammar, SpellingGrammar: Simple Past and Past ContinuousOther quiz:
Vocabulary and Grammar › ViewChoose the comparative form of “bright”.
A. Brightest
B. More bright
C. Brighter
D. Most bright
Grammar › View
I have 2 pencils. One is black, and ______ is blue.
A. another
B. the other
C. the others
D. others
Relative Clause › ViewHe arrived with a friend ______ waited outside in the car.
A. whom
B. which
C. who
D. whose
Perfect Tenses › View
The villagers _______________ the old man’s house.
A. have repaired
B. has repaired
C. had repair
D. had repaired
