[ Grammar ]
They _______________ some action on pollution this year, and the air is already cleaner.
A. had taken
B. have taken

Random Topics:
Past Perfect Simple & Past Perfect ContinuousUnless If First ConditionalLinking WordsGerund and Infinitivewas wereModals "Should"Giving and Asking for AbilityPrepotitionsWas and WereHave to / Do not have toOther quiz:
Tenses › ViewAccording to the magazine “Science”, scientist —- treatments for some deadly diseases, such as cancer, by the year 2025.
A. will have discovered
B. discover
C. have discovered
D. are going to discover
Homonyms › View
The appetizer is meant to ___ your appetite.
a. wet
b. whet
We will meet at the cafe later.
A. Simple Present
B. Present Continuous
C. Present Perfect
D. Simple Future (with modals)
Conjunctions › View
Fill in the blank with the correct conjunction for contrast: “___ he works hard, he rarely gets promoted.”
A. Because
B. Although
C. If
