[ Adverbial Clauses ]
Mary will have finished all her work ____________
A. as soon as her boss returned
B. until her boss will return
C. by the time her boss returns
D. when her boss will return

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Grammar › ViewShe has read all the books in the library,……she is looking for more.
A. as well
B. however
C. but
D. and
Grammar › View
Her __________ to solving problems is unique.
A. approach
B. operation
C. scheme