用is或are填空：
（1）There ______ some rulers in the schoolbag.
（2）There ______ an apple on the table.
（3）There _______ some milk in the glass.
（4）There _______ three boys in the playground.
相关试题
用is或are填空：
（1）There ______ some rulers in the schoolbag.
（2）There ______ an apple on the table.
（3）There _______ some milk in the glass.
（4）There _______ three boys in the playground.
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