[ Grammar ]
It is always interesting ——- people in airports while you’re waiting for a flight
A. being observed
B. observe
C. to have observed
D. to observe

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A. fourty
B. forty
C. four
D. thirty-one
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I want to feel ______joy.
A. Ø
B. the
Vocabulary › Viewstretched or pulled tight; not loose or slack
A. artillery
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C. plunge
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The cleaner ………… the floor every week.
A. sweeps
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C. sweep
