Mar Levine, scientist at University of Pennsylvania, US, has found that competit
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Mar Levine, ____ scientist at University ofPennsylvania, US, has found that competitive eaters have stomachs that canexpand like ____ balloon.
| A．a; a | B．a; the | C．a; / | D．the; a |
试题答案
【答案】
A
【解析】考查冠词。第一空表示泛指一位宾夕法尼亚大学的一位科学家；第二空仍然表示泛指气球。