[ 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:
Tenses › ViewTo give instructions or directions
A. present simple
B. present continuous
C. past simple
D. past continuous
Comparison Degree › View
I can run ……….. than before.
A. More further
B. Far
C. further
D. As far as
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
