I. WOED FORM: a) ________________________are doing their best to make people aware of the danger of air pollution. (environment) b) The British government ______________________the railways in 1948. (nation) II. TENSE FORM a)They were made ______________________long hours. (work) b) Don’t worry! She ________________________back in a few minutes. (come) c) You should have this letter _________________________into English. (translate) d) He _______________________while he was going home last night. (rob) e) We had difficulty _______________________her to enter the competition. (persuade) f) You wouldn’t look so tired if you ________________________up late last night. (not stay) III. REWRITE a)Without your help, I can’t finish my work on time. ->If _____________ b)The test is too long for us to do in one hour. ->The test is not ________ c) You needn’t change your telephone number. ->It _____________ d)No one in the class studies as well as Lan. -> Lan is ________________________________________ e) He introduced me briefly to the school’s teaching staff. ->He gave _________