[ Grammar ]
The scientist explained that water ___ (boil) at 100 degrees Celsius.
A. boiled
B. boils
C. had boiled

Random Topics:
ModifiersGrammar - QuantiflierGender and GrammarAdverbs and PhrasesPrepositionsGrammar: so and suchComparatives - SuperlativesGerunds & Infinitives + VocabularyPast Simple or Past ContinuousVerbs & AdverbsOther quiz:
Vocabulary and Grammar › ViewThere is a planetarium wing _ the science museum. I always go there whenever I visit the museum.
A. in
B. on
C. into
D. about
Present Perfect Tense › View
A beautiful girl has ….. Me a cake
A. making
B. made
C. meant
D. make
Grammar › ViewThe movie “White House Down” was really ________.
A. Exciting
B. Excited
C. Excite
Grammar › View
A word that describes a noun, like loud (music).
A. Adjective
B. Noun
C. Verbs
D. Pronoun
