Find one grammatical error in the underlined ①~⑤ and correct it.
There are times ① what we want to forget something, especially if
it is emotionally painful.
These types of memories can cause stress, so
it’s understandable ② why we want to get rid of them.
We forget
memories in a conscious form and in an unconscious form, which is
called repression.
However, not all psychologists believe in the
concept of ④ repressed memories since it’s difficult to study whether
or not a memory has been repressed.
Nonetheless, it’s important to note that practicing acts like remembering and recalling are crucial to
strengthening memory.
However, memories of painful events may be
less likely to be remembered.
( ) what when [that]

Grammar