问题:
【题文】Polar bears live mostly on_____ sea ice, which they use as ____platform for hunting seals.
A.a;a
B.a;the
C./;a
D.the;/
【题文】Polar bears live mostly on_____ sea ice, which they use as ____platform for hunting seals.
A.a;a | B.a;the | C./;a | D.the;/ |
参考答案: