Question

1. you wouldnt know by looking at them—they might look strong and confident and very pleased with themselves.
2. probably youll never know the details, but you can imagine.
3. most people are a bit mean to someone at some point, or have wanted to be, even if they dont actually do or say anything.
4. if you are a bit older and your parents have a new baby, it is not surprising if you get angry.
5. realizing why you might not be very nice to other people can help you see how someone else could be not very nice to you.

paraphrase
a. you can guess the reasons.
b. your own behavior can help you understand other peoples.
c. people are not always as strong confident as they seem.
d. it is normal to be angry if you attention than a new broth
e. even the nicest people thi thoughts occasionally.

Explanation:

1. The original sentence says you can't tell from their appearance as they may seem strong - confident. Option c matches as it implies people aren't always as strong - confident as they seem.
2. The original says you may never know details but can imagine. Option a is about being able to guess reasons, which is similar.
3. The original mentions most people are mean or want to be at some point. Option e is about even nice people having mean thoughts sometimes.
4. The original talks about getting angry if parents have a new baby when you're older. Option d is about it being normal to be angry if getting less attention than a new sibling.
5. The original is about understanding why others may not be nice by realizing your own reasons. Option b is about your behavior helping understand others' behavior.

Answer:

1. c
2. a
3. e
4. d
5. b