• 2021-04-14
    ______ are the birds doing? They are singing in a tree.
  • What

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      Is this __________ apple tree? No, it is __________ orange tree.

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      The cherries on this tree are bigger than ______ on that tree.

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      The boy is sitting ____ the tree, there are many apples ____the tree.

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      —Is this __apple tree?—,it is __orange tree. A: an/the B: the/the C: an/an D: the/an

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      中国大学MOOC: —Is this ____________ (an / the ) apple tree? —No, it is ____________(an / the ) orange tree.