[ Grammar ]
Fortunately, the hospital’s new air-conditioning system ________ when the first heat wave of the summer arrived.
A. had installed
B. installed
C. had been installed
D. had been installing

Random Topics:
Adverb ClausesArgumentative VocabularyLinking VerbSimple Present and Past TensesActive & Passive VoiceInfinitives and ING FormsPresent Perfect and Present Perfect Progressive TensesNouns FormationModal Verbs for Permission and ObligationPresent Simple vs Present ContinuousOther quiz:
Sentence Structure › ViewBecause the store was closed. We couldn’t buy any groceries.
A. NO CHANGE
B. Because the store was closed,
C. Because the store was closed
D. The store was closed
Prepositions › View
Can you turn down the TV? It’s hard for me to concentrate ___ this report with so much noise.
A. in
B. on
C. for
D. with
Grammar › ViewI want to go to Paris for my honeymoon, but she ___.
a. don’t
b. doesn’t
c. didn’t
Grammar › View
I want to be __________________ woman in the world.
A. the most beautiful
B. the beautiful
C. beautiful
D. more beautiful
