Mom, I was the first to reach the top of the mountain. — Good job, Charlie. I’m______ of you.

___ countless failures, the scientist finally succeeded in discovering the chemical substance. [ ]

Which of these shirts do you like best— I’ll take.They are all expensive and out of fashion.

38. — What are you going to do tomorrow — I will go _____ with my friends on thelake.

The children were _____ into different groups according to how much they know.[ ]