[ 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:
Grammar › ViewNext week we celebrate the biggest ______________ in the calendar for us, the independence of our country.
A. a yellow streak
B. red letter day
C. red-handed
Grammar › View
Finally! We ___ our house!
A. ‘ve sold
B. have been selling
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