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

Random Topics:
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:
Past Tense, Recount Text, and Future Tense › ViewOn Saturday night, we went to the Town Hall. It was the last day of the year and a large crowd of people had gathered under the Town Hall clock. It would strike twelve in twenty minutes’ time. Fifteen minutes passed and then, at five to twelve, the clock stopped. The big minute hand did not move. We waited and waited, but nothing happened. Suddenly someone shouted,”It’s two minutes past twelve! The clock has stopped!”
I looked at my watch. It was true. The big clock refused to welcome the New Year. At that moment, everybody began to laugh and sing.
Based on the text, where was the writer?
A. At the center of the town
B. At home
C. At the market
Tenses › View
Which tense do we use to narrate the main events in a story?
A. past simple
B. past continuous
C. past perfect
Preposition › ViewWhat 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
