He is a real turtle .
Someone who always moves very slowly.
She is such a sheep.
A follower; someone who can't think for him or herself.
He's being an ostrich .
Someone who hides his/her head in the sand and refuses to face problems or reality.
He's a lamb.
A gentle, patient, understanding person. Nice and considerate.
What a crab  he is!
A grouchy  person; someone who is often angry and in a bad mood.
If a person is like a turtle, which of these is most likely to be a problem to him or her?
Keeping the house clean. Learning a new language. Getting to school on time. Saving money for future use.