[ Grammar ]
If only they _____ in the building when the bomb exploded.
A. hadn’t been staying
B. hadn’t stay
C. didn’t stay
D. weren’t staying

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A. is, for
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Modals of Obligation › View
Complete the sentences with the correct form of the modals and verbs in parentheses:
She ___________ (have / wear) a uniform for work. She wears her own clothes.
A. hasn’t to wear
B. doesn’t have to wear
C. don’t have to wear