用“there”“be”的正确形式填空.
1._______aduckintheriver.
2._______manystudentsinourciassroom.
3.______somedoctorsinthehospital.
4.-______adoginthegarden?Yes,________.
5._______anyboysintheschoolbus?Yes,________.
6.________nomilkinthebottlenow.
7.________somenewstorybooksoverthere.
8.Howmanyflowers________inthevase.
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