【题目】用be 动词（am, is, are）的适当形式填空。
【1】There ______ a tree in the park.
【2】There _______ a house and a tree in the park.
【3】The ducks in the lake _______ very cute.
【4】There _______ some fish in the lake.
【5】There _______ lots of flowers in the garden.
【答案】
【1】is
【2】is
【3】are
【4】are
【5】are
【解析】
略