After the new technique was introduced the factory produced ______cars in 1994 as the year before.
| A．as twice many | B．as many twice | C．twice as many | D．twice as |
—The room is so dirty, _____ we clean it?
—Of course.
| A．will | B．shall | C．would | D．do |
There are many kinds of birds in Australia, and over 140 species of snakes, ______are extremely dangerous.
| A．many of those | B．many of that | C．many of which | D．many of what |
_____ makes a new invention such a wonderful thing is ____ it allows us to do something ____ we could not do before.
| A．What; what; what | B．That; that; \ | C．What; that; \ | D．That; what; that |
Over the past 40 years, 29 other Chinese people ____ Mount Qomolangma successfully.
| A．climbed | B．have climbed | C．had climbed | D．climb |
Mrs. Taylor has 8-year-old daughter who has gift for painting – she has won two national prizes .
| A．a ; a | B．an ; the | C．an ; a | D．the ; a |