[ Prepositions ]
The janitor is responsible _________ helping keep the building clean.
A. For
B. By
C. To

Random Topics:
Tenses and ComparisonsPresent simple, Present continuous, Singular, PluralProgressive TenseRequest with Modal VerbsAll, Both, Neither, None, EitherSo....that... Such.......thatPhrase or ClausePresent Simple and Present Continuous TensesGrammar (was, were, could, could not)Modals and VocabularyOther quiz:
FOR & SINCE › ViewWe have been living here _______ 2 months.
A. since
B. for
Modal Verbs › View
Tom ___ be in his room. I heard him talking to someone.
A. must
B. should
C. can
D. need
Vocabulary › Viewto create by arranging or inventing
A. devise
B. dogged
C. endeavor
D. execute
Grammar › View
Which of the following is an example of an adjectival clause describing an object?
A. The house where I grew up is now a museum.
B. The girl who won the competition is my best friend.
C. The book that I borrowed from the library is fascinating.
D. The day when we first met was unforgettable.