题文
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 |
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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