In America, _____ car is _____ popular means of transportation.
| A．the; a | B．a; the | C．the; the | D．the; / |
Through thorough investigation, Dr. John Snow was finally able to prove that the outbreak of Cholera _____ people’s drinking of polluted water.
| A．was close linked with | B．closely linked to |
| C．was close connected with | D．was closely linked with |
By careful observation and precise calculation, Nicolaus Copernicus _____ that there is no one center in the universe and the sun is the center of the solar system.
| A．believed | B．thought | C．concluded | D．imagined |
______ the aids from the outside, the positive attitude of the disaster-stricken people _____ the key role in the reconstruction of their destroyed towns and villages.
| A．Except for; plays | B．Besides; play | C．Apart from; plays | D．Except; play |
It has been announced by our provincial government that another two medical teams will be sent to ______ the injured people in the severe earthquake.
| A．join to | B．join in | C．take part in | D．attend |
Samples of blood from Cholera infected patients have been sent to the blood center _______.
| A．to be checked | B．to be examined | C．to test | D．being tested |