Science and nature 单元检测(A卷——全员必做)
Ⅰ.单项填空
1．(2014·徐州高三模拟)When she heard her son had been admitted to a key university, words couldn't ________ her excitement.
A．convey B．explain
C．conduct D．distinguish
2．(2014·蚌埠九中模拟)General secretary Xi Jinping urged Washington ________ concrete measures to loosen hightech export controls to China.
A．adopting B．to adopt
C．adopted D．to be adopted
3．(2014·江苏潼阳中学模拟)It is reported that onethird of the food Americans eat ________ upon foreign raw materials and the great majority of the people ________ used to it.
A．depends; get B．depends; gets
C．depend; get D．depend; gets
4．(2014·湖北荆州高三质检)We use passwords (密码) to keep our personal information secret and safe, but some passwords we use may not be as ________ as we think.
A．accurate B．appropriate
C．complex D．reliable
