For example you will have to use chlorine a strong disinfectant in the pool to keep it clean.
A. For example you will have to use chlorine a strong disinfectant in the pool to keep it clean.
B. For example, you will have to use chlorine, a strong disinfectant, in the pool to keep it clean.
C. For example you will have to use chlorine, a strong disinfectant, in the pool to keep it clean.
D. For example, you will have to use chloring, a strong disinfectant, in the pool, to keep it clean.

Random Topics:
Adverbial Clause of ConcessionInfinitive and GerundPresent Continuous, Present Perfect and Used toAdverbs and Time ExpressionsTypes of Sentence StructurePunctuation and Grammarlike/do not likePresent Simple and Modal VerbsSuperlative & Comparative AdverbsReported Speech and Reporting VerbsOther quiz:
Grammar › ViewHe used to drive a truck, _____
A. does he?
B. didn’t he?
C. do they?
D. do we?
Grammar › View
I don’t have umbrella and it’s raining. I wish I ____________ an umbrella.
A. have an umbrella
B. has an umbrella
C. will have an umbrella
D. had an umbrella
Mixed General Quiz › ViewThe neoprene wet suit was ___ by a resident of Santa Cruz because the water there is cold but the surfing is good.
a. invented
b. invent
c. inventing
Present Tenses › View
My dad works nights so we don’t see much of him in the week.
A. This is true just this week.
B. This is true every week.
