[ Expressing Obligation and Modals ]
Choose the correct option to complete the sentences:
Companies ___________ invest in technology to communicate with customers online.
A. have to
B. mustn’t

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Tenses › ViewI ______ to the gym every day last month.
A. have been going
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Grammar › View
Lillian teaches English, and ____ her cousin, Amy.
A. do too
B. also does
C. so do
D. so does