Ⅳ. Read and choose the right answers.
为下列各题选择恰当的选项。
() 1. They playing with each other.
A. am B. is C. are
() 2. Wu Binbin is lunch now.
A. eat B. eats C. eating
() 3. The carrots are .
A. their B. they C. theirs
() 4. Is he water?
A. drink B. drinking C. eat
() 5. Fido sleeping.
A. is B. am C. are

1. C
2. C
3. C
4. B
5. A

1. 主语"They"为复数，be动词用"are"。
2. 句子中有now，表示现在进行时，结构为be+动词-ing形式，"is eating"正确。
3. 此处需要名词性物主代词，"theirs"表示“他们的（胡萝卜）”。
4. 现在进行时结构为be+动词-ing形式，"drinking"正确。
5. 主语"Fido"为单数第三人称，be动词用"is"。

Ⅴ. Read and complete the sentences.
按要求完成句子。
1. Oliver is reading under the tree.(对画线部分提问)
Oliver under the tree?
2. This is her schoolbag.(改为同义句)
This schoolbag is .
3. Chen Jie runs in the park.(改为现在进行时)
Chen Jie in the park.
4. The dog is Amy's.(对画线部分提问)
dog is it?

1. What is; doing
2. hers
3. is running
4. Whose