Samuel Clemens, _____ Mark Twain, became a famous American writer.
| A．was known as | B．known as | C．was known for | D．known for |
Now that spring is here, you can ______ these fur coats till you need them again next winter.
| A．put forward | B．put down | C．put away | D．put off |
Up to now, the program ______ thousands of children who would otherwise have died.
| A．would save | B．saves | C．had saved | D．has saved |
Mark needs to learn Chinese ______ his company is opening a branch in Beijing.
| A．unless | B．until | C．although | D．since |
Paper money was in ____ use in China when Marco Polo visited the country in ____ thirteenth century.
| A．the; / | B．the; the | C．/; the | D．/; / |
----I’m sorry I made a mistake !
----_______. Nobody is perfect .
| A．Take your time. | B．You’re right. | C．Whatever you say. | D．Take it easy. |