★ Modals of Obligation
Complete the sentences with the correct form of the modals and verbs in parentheses:
Companies ___________ (must / promise) customers products they cannot build.
A. must promise
B. mustn’t promise
C. musts not promise
Preview next quiz:
Complete the sentence with the correct option.
He _________take the exam. It’s optional.
A. don´t have to
B. doesn’t have to
C. mustn’t
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