Scientists photographed for the first time ever _____ wild gorillas used a stick to test the depth of a pool before getting into it, according to a recent study.
#59036
A
which
B
what
C
that
D
when
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. Being out of order, ______ to the factory.
#4726
A
he sent his computer
B
he drove at once
C
his computer was sent
D
his father helped him send it
Expo 2010 Shanghai China will offer ____ wonderful opportunity for ____ cross - culture dialogues．
#4793
A
a;不填
B
a; the
C
不填;the
D
the;不填