[ Grammar ]
Before the laboratory carts can be used to transport……………materials,technicians must wipe all exposed surfaces with a disinfectant cloth.
A. vague
B. passive
C. sensitive
D. demonstrative
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Grammar › ViewThe Russians launched the first artificial satellite in 1957.
A. Simple Present Tense
B. Present Progressive
C. Simple Past
D. Present Perfect
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Shoplifting, or stealing goods from a store, is a form of what?
A. larceny
B. charity
C. rivalry
D. irony
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A. They’re
B. There
C. Their
D. They are
Past Continuous vs Past Simple › View
Because of the rain, we ______________ to the beach yesterday afternoon.
A. didn’t go
B. wasn’t going
C. weren’t going