______ is know to all, china will be an________ and powerful country in 20 or 30 year’ time.
A. That, advancing B. This, advanced C. As, advanced D. It, advanced
When I went in , they were ____ in a heated discussion .
A .absorb B .absorbed C .absorbing D .being absorbed
The ________ for tonight’s talk is protecting the environmet.
A. title B．subject C．news D．theme
You can't camp________you like these days. Many natural areas are now under protection.
A．whichever B．wherever C．what D．when
The samples__________in quality but were general acceptable．
A. varied B. changed C．disagreed D．Exchanged
Cleaning women in big cities get _____ by the hour.
A. pay B. paying C. paid D. to pay
