选择下列合适的短语用适当的形式填空:1.after graduation 2.inform...of 3.so...that 4.read...aloud 5in preparation for 6.at first 7.in charge 8.be required to (do sth) 1.He sharpened his knife( )cutting the meat.2.Every student( )obey school rues.3.How can he get a good job ( ) if he doesnot work hard now 老师最好解释为何如此应用,