[ Grammar ]
Which one of the following is a noun?
A. book
B. skip
C. walk
D. sleep

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Grammar › ViewThe weather (be) ____________ strangely fine this morning when I opened the windows.
A. is
B. am
C. was
D. should
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Luxembourg is the ___________ (safe) city in Europe.
A. dangerous
B. safest
C. unsafe
D. secure