摘要：15．The cat caught two last night. A．mouses B．mice C．mouse D．mices 16．Jack went to have two pulled out yesterday afternoon. A．tooths B．tooth C．teeth D．toothes 17．The leaning tower is about 180 high. A．feet B．foot's C．foots D．feets 18．There are many on the hill. A．sheeps B．sheep C．sheepes D．sheep's 19．There are six and fifteen in this workshop. A．mans; womans B．men; women C．men; womans D．mans; women 20．In our school there are fifty-five . A．women teachers B．woman teachers C．women teacher D．woman's teacher

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