When the students were playing games on the playground, Jim suddenly stopped _____and began to cry, so we stopped _______ what was wrong with him.
I _______ English is easy, I like it.
My brother and I _________ in the same class.
The photo of my family is _____________.
The blue pen is mine. The red one is _____________.
“世贸组织”的英文缩写是_____________