____ that silver is not widely used as a conductor?
| A．Why is | B．Is it why | C．Why is it | D．Why is that |
—What did you do last night?
—I______________my homework but nothing else.
| A．did | B．was doing | C．has done | D．had done |
Nowadaystherolesofhusbandandwifearenotas__________definedasbefore,especiallywhenbothpartnersworkandearnmoneyforthefamily.
| A．clear | B．clearer | C．clearly | D．moreclearly |
Among the films being nominated （提名）_____directed by Zhang Yimou.
| A．one is popular | B．is as popular |
| C．a popular film | D．is a popular film |
— What happened then?
— The Red Army _____ the bridge after they crossed it.
| A．broke into | B．broke out | C．turned into | D．burned down |
— Did you look up the time of planes to Beijing?
— Yes, the earliest plane is to leave at 5:30 am.
| A．likely | B．probable | C．possible | D．due |