What makes the space shuttle________is that it takes off like a rocket but lands like an airplane．
A. exceptional B．strange C．unique D．rare
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Cleaning women in big cities get _____ by the hour.
A. pay B. paying C. paid D. to pay
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The samples__________in quality but were general acceptable．
A. varied B. changed C．disagreed D．Exchanged
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You can't camp________you like these days. Many natural areas are now under protection.
A．whichever B．wherever C．what D．when
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The ________ for tonight’s talk is protecting the environmet.
A. title B．subject C．news D．theme
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When I went in , they were ____ in a heated discussion .
A .absorb B .absorbed C .absorbing D .being absorbed
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______ 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
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