问题
选择题
They saw ________ octopus and ________ dolphin at the aquarium.[ ]
A. an; an
B. an; a
C. a; an
D. a; a
答案
答案：B
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They saw ________ octopus and ________ dolphin at the aquarium.[ ]
A. an; an
B. an; a
C. a; an
D. a; a
答案：B