He passed the letters to the Department of Trade and Industry.他把信交给了贸工部。I am expecting several important letters but nothing has arrived.我正在等几封重要的信件，可是一封都没到。We delved through a sackful of letters to draw the winning name...
...research related to microcomputers and their use in classrooms...关于微型电脑及其课堂使用的研究In many places, classrooms are overcrowded and curricula are outdated.许多地方的教室过于拥挤,课程已经过时.New blackboards have been fitted up in all the c...