China is a _________ country while Japan is a _________country.A. developed; developingB. development; developingC. developing; developed
They looked _____ each other and kept their secrets _____ themselves.
Jack had a wonderful time _____ many interesting places in Beijing and he had much time __________ the city.
I have some problems __________ my homework. Could you tell me _____?
The girl _____ a smile on her face is always kind _____ others.
This text is _____ easier and _____ interesting than that one.