3. There a tiger the zoo.
4. A： How are there?
B： are .
3. There isn't a tiger in the zoo.
4. A： How many libraries are there? B： There are two.
3. isn’t; in 4. many libraries; There: two
题目来源：2016年通城学典课时作业本四年级英语下册开心版 > Unit1 My school
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