The seaman _____ swim only half way before he drowned.
| A．could | B．might | C．was able to | D．would |
One of Marx's works written in English in the 1860s.
| A．was | B．were | C．would be | D．are |
The number of the people who cars increasing.
| A．owns, are | B．owns, is | C．own, is | D．own, are |
of the money used up.
| A．Three-five, are | B．Three-fifths, have been | C．Three-fifths, has been | D．Third-fifths, is |
Seventy percent of the students in our school from the countryside.
| A．is | B．are | C．comes | D．are coming |
No one except Jack and Tom the answer.
| A．know | B．knows | C．is knowing | D．are known |