[ Modal Verbs ]
If you don’t understand the lesson, you ___ ask the teacher.
A. should
B. must
C. may
D. can

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Vocabulary › ViewA bend in layers of rock is also known as a _________________.
A. tilt
B. fold
C. fault
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Vocabulary › View
Verb, to crouch down in fear.
A. Wince
B. Cower
C. Inxextricably
D. Vigilance