句子填空（共5分）

小题1:It’s very convenient to ____ _____ _____ _____ their families and friends by using mobile phones.

小题2:Some of them even waste precious time in class _______ _________ ___________. 

小题3:With the global warming getting worse, more people choose to live a low carbon life ______ ______ __________ _____ reducing greenhouse gases.

小题4:Only by_______ _______ ________, will we have fewer disasters and a safer earth. Let’s work together and fight for a better future.

小题5:Wash your clothes by hand______ _______ ______ __________ instead of using washing machines.

Assistant软件需要的“*.gst”格式的地图文件可以通过（）软件转化“*.tab”格式文件所得。