D Read and write

Grandpa: Hi, Mike! What are you doing?
Mike: Hi, Grandpa! 1 .
(making, and, are, Helen, I, sandwiches)
We have bread, tomatoes and eggs.
Grandpa: How nice! 2 ?
(tomatoes, the, Is, washing, Helen)
Mike: Yes, she is.
Grandpa: 3 ?
(the, you, bread, Are, cutting)
Mike: No, I'm not. I'm cooking the eggs.
Grandpa: Great! What's our dog Ben doing?
Mike: 4 .

(It's, food, eating, some)

1. Helen and I are making sandwiches
2. Is Helen washing the tomatoes
3. Are you cutting the bread
4. It's eating some food

本题考查现在进行时的陈述句和一般疑问句语序：
1. 陈述句结构：主语+be动词+动词-ing+宾语，将单词组合成正确句子；
2. 一般疑问句结构：Be动词+主语+动词-ing+宾语，将单词组合成正确句子；
3. 一般疑问句结构：Be动词+主语+动词-ing+宾语，将单词组合成正确句子；
4. 陈述句结构：主语+be动词+动词-ing+宾语，将单词组合成正确句子。