题目内容
Do you know _an "o" and _ "u" in the word "computer"?
A. there is, an B. is there, an
C. there is, a D. is there, a
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题目内容
Do you know _an "o" and _ "u" in the word "computer"?
A. there is, an B. is there, an
C. there is, a D. is there, a