Look at the sign _______! We shouldn't park our car here.
My friend pal and I often talk _______．
—Is your brother _______ TV?—No，he's _______ a book.
Listen，the girls ____ an English song.
Students in our school _______ know shouting in the library is not allowed.
Mother put a quilt (被子) _________ the sleeping boy to keep her warm.
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