[ Modals ]
We __________ drop litter on beaches. It pollutes them.
A. mustn’t
B. can
C. should
D. must

Random Topics:
3rd Person SingularComparison and ModalsAdverbs of How Something is DoneExpressing Obligation and ModalsPreference & Future TenseParallel Structure or Combining SentencesModal Auxiliary VerbsLinking VerbSimple Past Tense and Present Continuous TenseAdverbs of TimeOther quiz:
Tenses › ViewThey ________ (sit) in front of the computer every evening.
A. sit
B. sits
C. sat
D. sitted
Grammar › View
At night they ____to wash the dishes.
A. has
B. have
Grammar › ViewI haven’t seen Tom ___________________ two years.
A. since
B. just
C. for
D. already
Present/Future/Past Simple/Present Perfect › View
Pasteur _____ in the 19th century.
A. A. was living
B. B. lived
C. C. had lived
D. D. has lived
