[ TOEFL Adjective and Adverb ]
. . . . chief advantage of renewable energy sources is their sustainibilty
A. By the
B. The
C. It is the
D. That the
Select your answer:
Random Topics:
Past Progressive TensePresent or Past TensesGerundSimple Past Tense and Present Continuous TenseGrammar SuffixesIf Conditional Zero and OneInfinitive and GerundsCity Places-ed/-ing AdjectivesOther quiz:
Prepositions › ViewShe plays tennis ___ Fridays.
A. in
B. on
C. at
D. every
Grammar › View
Tom_________ his bike at the moment.
a. cleans
b. clean
c. isn’t cleaning
d. cleaned