[ Tenses ]
Which tense is used in the sentence “They were studying when the power went out”?
A. Past Continuous
B. Future Continuous
C. Simple Past
D. Simple Present

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Grammar › View3-D printing ____ complex tools and components.
A. is used for produce
B. is used to produce
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She ______ her friends every Friday for dinner.
A. meets
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A. used to
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Vocabulary and Grammar › View
Choose the word with the correct spelling.
A. Acient
B. Ancint
C. Ancient
D. Ancent
