【2013四川雅安】They arrived Shanghai a cold morning.
I often saw the boys in the river.
This math question is too difficult. Can you help me ?
Mr. Black asks the kids ________ in the river, because it’s too dangerous.
He is very angry with his mother, because his mother always him with the best student.
—What’s wrong?—I can’t do my homework now. I my homework in the classroom this morning.