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Everyone has periods in their lives ______ everything seems very hard.
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A
when
B
where
C
which
D
that
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We’ll have our picnic in the place _____ most of us like best.
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where
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which
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who
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as
The clever boy made a hole in the wall, ________ he could see what was going on inside the building.
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on which
B
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through which
D
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He likes the birthday presents ______ his friends gave him.
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that
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The house_________was destroyed has now been repaired.
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the roof of it
B
whose roof
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An unusual Halloween party, an annual event in Boulder, Colorado, ____is known as the Naked Pumpkin Run, caused trouble.     
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A
what
B
that
C
it
D
which