The company (be) ______in the land market since 1990 and it is now taking the lead in this field.

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问题 The company (be) ______in the land market since 1990 and it is now taking the lead in this field.

选项

答案has been

解析 本题考查动词时态。根据时间状语since 1990作时间状语,要求句中用现在完成时。另外,主语the company为单数第三人称,因此,空格处填has been。
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