Johnny knew what he had to do: Save the president
Johnny knew what he had to do; he had to save the president
(Examples)
Answer: Look at explanation
Explanation:
There's several ways to correct it but adding commas is the best way. You could also make it two separate sentences as well.
Thomas and Jonathan were looking forward to going to the library, but since it was closed, they decided to visit the bookstore at the mall.
Thomas and Jonathan were looking forward to going to the library. Since it was closed, they decided to visit the bookstore at the mall.
