The large grassland, reaching out far away, looks extremely beautiful _______ the blue and clean sky.
#28257
A
with
B
against
C
through
D
beyond
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He found his house broken into and many things stolen _______ his return from office.
#26462
A
with
B
in
C
at
D
on
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
#26213
A
of;at
B
by;in
C
of;on
D
on;at