If energy………inexpensive and unlimited, many things in the world would be different.
A. is
B. will be
C. were
D. would be

Random Topics:
Grammar, Literature, and VocabularyInterrogative PronounsGrammar and ReadingMust and Might ModalsPresent Perfect ContinuousZero & First ContidionalModals VerbsPast or Present Verb TenseVocabulary and TensesExpressing Obligation and ModalsOther quiz:
Vocabulary › Viewa group of people who come together to discuss issues, make decisions, or offer advice
A. Council
B. Audience
C. Spectators
D. Viewers
Tenses › View
Ann never (study) ________________ online .
A. studies
B. studied
C. not studying
D. study
Grammar › View. She has ___ many books to carry.
A. to
B. too
C. two
Conditional Sentences › View
Binh is very busy, he cn’t help his wife with household chores
A. If Binh isn’t very busy, he can help his wife with household chores.
B. If Binh weren’t too busy, he could help his wife with household chores.
C. Provided that Binh weren’t very busy, he couldn’t help his wife with household chores.
D. As long as Binh is very busy, he can’t help his wife with household chores.
