[ Modals in the Past - Speculation and Deduction ]
The government _________ implemented a more efficient process for naturalization to reduce delays. However, they weren’t aware of the increasing in immigration.
A. could have
B. must have

Random Topics:
Es and SPresent Perfect and Present Perfect Progressive TensesPast ModalsPresent Perfect SimpleSpellingGrammar - Present PerfectComparatives and Past Perfect TenseFuture Tenses, Conditionals and ProfessionsAcademic VocabularySimilesOther quiz:
Phrasal Verbs › ViewThe craft of basket weaving is usually _________ from generation to generation.
A. come back
B. closed down
C. passed down
D. found out
Tenses › View
He ___ for hours when he finally took a break.
A. had worked
B. had been working
C. worked
D. was working
Grammar › ViewHer picture is now _____ on my desk.
A. sitting
B. setting
Grammar › View
“Has anyone ever ____ an albino tiger before?” Miss Chua asked her students?
A. see
B. saw
C. seen
D. sees
