[ Modal Verbs ]
The book is optional. My professor said we could read it if we needed extra credit. But we_______________ read it if we don’t want to.
A. don’t have to
B. must not
C. cannot

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Coordinating ConjunctionsComparative - SuperlativePresent Continuous for FuturePunctuation and GrammarPerfect Verb TensesIntermediatePossessive Adjectives and Possessive PronounsActive and Passive voiceFirst Conditional & Future Tensesand, so, but, becauseOther quiz:
Grammar › View______ they play football every day?
A. Are
B. Is
C. Do
D. Does
Grammar › View
Our teacher asked us to meet her at the ___________ at 10.30 am.
A. libarary
B. libary
C. libbary
D. library
