When we combine two sentences we want to include all of the details, but we don't need to repeat anything. Both sentences start with "The girl" which only needs to be in our sentence once. Also, the adjectives and adverbs need to match the correct nouns and verbs. "Young" is describing "girl" and "quickly" is describing "ran". 

The correct answer is, "The young girl quickly ran around the track. " 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about Jeannette. 

Jeanette is tired because she's been working a lot of extra hours at work. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about flowers. 

My mom planted purple flowers in our yard. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about the car. 

The old car broke down. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about Brian. 

Brian is a science teacher. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about Jenn and coffee. 

Jenn drinks black coffee every morning.

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about the knife. 

I cut myself with the sharp knife. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about Blin's birthday. 

Blin celebrated his birthday on Friday. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about ice cream. 

They ate the cold ice cream. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information. 

When you write, you can sometimes combine two sentences together to make a longer sentence. Two sentences can be combined if they share some of the same information. 

In this case, both sentences talk about a hat. 

I wore a red hat to school. 

Notice that the correct answer correctly combined all of the information from both sentences. When you combine two sentences into one, you don't want to leave out any of the original, or unique, information.