The way he acted towards people was to keep on good terms with them ______ principle, which was usually thought little of.
A. at the mercy of B. at the risk of
C at the expense of D. at the bottom of
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. |
--- You know Brad Pitt is already fifty．
--- You are kidding．He doesn’t look __________ ．
| A．it | B．this | C．the one | D．that |