原题:
题型:单项选择-四个选项
—What’s this?
—________ a dog.
—________ a dog.
| A.They are | B.This is | C.That is | D.It is |
题目考点:it is用于指代单数物或动物
| A.They are | B.This is | C.That is | D.It is |
题目考点:it is用于指代单数物或动物
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