21. In order to change attitudes ____ employing women, the government is bringing in new laws.
A．about B．of C．to D．on
22．－Is your headache getting______?
－No, it’s worse.
A. better B．bad C．less D．well
23． As we all know, some people ____under the building for many days in Sichuan Earthquake.
A．lay trapping B．lay to trap C．lay trap D．lay trapped
24．The new type of cell phone _____ better if it is advertised on TV.
A．will sell B．sells C．would sell D．sold
25．We can’t figure out ______quite a number of insects, birds, and animals are dying out.
A．why B．that C．as D．when
