rock 

There are a lot of rocks.

postcard  

He sent me a postcard.

machine  

Do you know how to handle the machine?

return  

He will return in a week or so.

more than 

There can be more than one answer.

(be) able to 

He is able to swim.

have to 

He’ll have to wear a spacesuit to help him breathe.

so that  

He wrote down my address, so that he might remember it.

take photos 

He likes to take photos.

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as … as  

I am going to take as many photos as I can.

that is  

That is the good news.

such as  

Heroes such as Huang Jiguang will always live in the hearts of the people.

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