1.English spelling presents special …........................... … for foreign learners. ( difficult) 2.The school is performing well, but we recognize the need for further ...............… … .( improve) 3.Let me introduce you a … …...................... university. I think it’s really reliable. ( repute) 4.We placed … ….............. in a number of national newspapers. ( advertise) 5.If you want to attend the course, you must pass the … ..................… examination. ( write) 6.We couldn’t go out because it rained ………….............................. . (cotinue) 7.The profesor criticized his students both …...........………….and individually. (collect) giúp em với em đang cần gấp ạ.