[ Grammar Clauses ]
Factories allow these dangerous substances to pour into the rivers, ___ their chimneys fill the atmosphere with poisonous fumes.
A. while
B. where
C. although
D. so that

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Transitive or Intransitive VerbsPresent, Past and Future TenseSubject Verb Agreement Irregular VerbGrammar and IdiomsModals and PhrasesConjunctions - ConnectorsNoun QuantifiersModal AuxiliariesVocabulary and DefinitionsTypes of Sentence StructuresOther quiz:
Modal Verbs › ViewIt isn’t necessary to submit my assignment today.
A. I must submit my assignment today.
B. I don’t submit my assignment today.
C. I could submit my assignment today.
D. I shouldn’t submit my assignment today.
Grammar › View
I’ll ___ the shopping and you choose the wine.
a. do
b. make
What are you talking _______ ?
A. about
B. on
C. with
D. to
Grammar › View
Sinta and Jojo _____ many songs
A. Sing
B. Sings
C. Singing
D. Sang