In the last twenty years, seven Canadian scientists _____ the Nobel prize!
| A．won | B．had won | C．was winning | D．have won |
25．The construction of the two new railway lines____by now.
| A．has been completed | B．have been completed |
| C．has completed | D．have completed |
24．He no less than I____eager goto the Great Wall.
| A．am | B．iS | C．are | D．Were |
23．What we want_____good textbooks.
| A．have | B．has | C．is | D．Are |
22．Half of the food in the bag_____bad．You’d better throw it away．
| A．has | B．have | C．are | D．Is |
21． More than one high official_____by the police since the mayor war shot dead.
| A．has been questioned | B．have been questioned |
| C．was questioned | D．were questioned |