[ TOEFL Adjective and Adverb ]
Mainly important for its chemical reactivity, chlorine can be used . . . water.
A. to sanitize
B. for sanitation
C. and sanitizing
D. sanitizes

Random Topics:
DescriptionsVocabulary Spelling GrammarConditional ClauseVerb-ing and InfinitiveGerund and To InfinitiveGrammar, adverbs of frequency placementPresent, Past, and Future TimeFuture TensesComparatives - SuperlativePhrasesOther quiz:
Grammar › ViewYou_______ sleep on your desk.
A. doesn’t
B. don’t
Grammar › View
By the time you arrive….
A. He’ll leave
B. He’ll have left
C. He leaves
D. He left
We need to plan our trip. I _______________ you tomorrow.
A. am going to call
B. are going to build
C. will drink
D. will be
Past Tense › View
kristina….. to an opera before she lived in Jakarta
A. was never going
B. has never gone
C. had never gone
D. did not go
