10. Some scientists believe that human beings are born with a(n) ___________ for
using their arms and legs to stay afloat, which, however, disappears within a few
months after birth.
11. In order to pay the bills, Linda __________ her grandfather's gold watch in secret.
12. Fish instinctively fight their way upstream against the ___________, and many
water birds and animals have the ability to travel long distance.
trim current with (a) bad grace hitherto
instinct pawn in a way rub
spicy transparent vacancy down and
out
in accordance with in good condition constitution
for sb.'s (own) part
instinct
pawned
current
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