[ Tenses ]
The fossil fuels ____ air pollution significantly last century.
A. contributed
B. contribute
C. is contributing
D. will contribute
Random Topics:
The Past SimpleComparisionModals and Active and Passive VoicePresent Simple PassiveInfinitive and GerundsCorrelative ConjunctionFuture Tense - will and going toAdjectives Ed and IngContinuous and Perfect TensesArticleOther quiz:
Present Continous Tense › View… are cooking in the restaurant
A. The student
B. The chefs
C. The teacher
Grammar › View
True or False: A sentence needs to be long in order to be complete.
A. TRUE
B. FALSE
Passive Voice › ViewUp to now, the equipment ____ regularly, but from now on, we ____ it before every outing.
A. wasn’t checked – are checking
B. hasn’t checked – will be checking
C. hasn’t been checked – are going to check
D. isn’t being checked – should be checked
Basic Grammar › View
The plane arrived (…) the airport just on time.
A. on
B. of
C. at
D. by