[ Participal Phrases ]
_____________, the books must be returned to the library.
A. Having been finished their exam
B. Having finished their exam
C. Finish their exam
D. Finished their exam

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Grammar › ViewEach of the cars in the parking lot __________ a parking permit.
A. need
B. needs
C. have needed
D. were needing
Adverbs of frequency › View
It _____ rains here in the summer.
A. always
B. seldom
C. never
D. sometimes