[ Subordinating Conjunction ]
She refused to go out ______ her friend begged her.
A. because
B. unless
C. although
D. if

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Vocabulary › ViewWhat is a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together.
A. metamorphic rock
B. sedimentary rock
C. igneous rock
D. index fossil
Grammar › View
Denver is located at the foot of __________ Rocky Mountains.
A. zero article
B. the
C. a
D. an
Grammar › View. . . . . . your Uncle come here every year?
A. Do
B. Does
Grammar › View
The teacher will take action _____ a pupil not complete his homework.
A. will
B. shall
C. would
D. should
