—Why are you so busy?

—Oh, I have to too many things on business.

A. does with B. do with C. do in D. did in

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When the best singer in our class , everyone shouted with excitement.

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It is easy for me to make some strawberry cakes.

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When you are curious about something and want to know more about it, you can use the way of asking questions. Asking questions is the first step to make discoveries and find interesting answers. The following steps can guide you during the research. 

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Step 2 Next, stop and think for a moment about what you have already known about your subject. List what you have already known like the sentences below: 

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Dinosaurs lived on the earth for more than 150 million years. 

Some dinosaurs ate plants; some lived on meat. 

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How many kinds of dinosaurs were there? 

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