Yes, I'm happy. I'm absolutely delighted/confused.
delighted
It might/can't be a bear. There aren't any bears here.
can't
We can all learn from making/doing mistakes.
making
Maybe/Definitely you're right. I'll ask my dad.
Maybe
Why are you so pessimistic/determined? You always think that bad things will happen.
pessimistic
It may/can't be a racoon, but I'm not sure.
may
You won't improve/insecure if you don't practice every day.
improve
I can probably/maybe come to your house--I'll tell you tomorrow.
probably
I think the weather will be sunny tomorrow. I feel ____ about the weather.
optimistic
You have walked all day. You ____ be tired now.
must
She had a fail/negative experience when she went skiing and never went again.
negative
Mary has eaten all the chocolate! She ______ liked it.(very sure)
obviously/definitely
Isn't Diego coming, too? Oh, Paz will be really ____ if he doesn't.
disappointed
Will we do it? I don't know, but if we work hard we ___ succeed.
may/might/could
Learning to play the guitar was sometimes a improve/frustrating experience for me.
frustrating
Santiago sometimes makes mistakes. ________ we should ask someone else. (not sure)
Maybe/Perhaps
He always wants to be involved. He's really _____.
enthusiastic
That boy looks like Mike, but it ____ be him because he is on vacation.
can't
I felt very succeed/insecure about entering the singing competition.
insecure
She looks furious. _______ she's angry about something. (very sure)
Obviously