Fix grammar errors in this sentence: Therefore, they do not have to worry for medical expenses when they are old.
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The first thing to do is to take a look at the following sentences:
- The first thing to do is to take a look at the following sentences.
- The first thing to do is to take a look at the following sentences.
- The first thing to do is to take a look at the following sentences.
- The first thing to do is to take a look at the following sentences.
- The first thing to do is to take a look at the following sentences.