[ Grammar ]
Many countries in the world ______ wind power on a commercial basis today.
A. used
B. will use
C. are using
D. uses
Select your answer:

Random Topics:
Noun and Modal VerbsModal and Auxiliary VerbsVocab CheckingParticipal PhrasesCan vs CouldInterrogative PronounsVerb and Sentence StructureModalFuture Simple TenseLinking Verbs & Helping VerbsOther quiz:
Grammar › ViewClosed plane figures like the square or the equilateral triangle can be grouped into a class ………… polygons.
A. called
B. to call
C. is called
D. call as
Conjunction › View
Tim likes candy, _____________ he doesn’t like chocolate.
A. so
B. hence
C. but
D. so that
