Нужна с здесь нужно раскрыть скобки используя правила употребления герундия: 1) the soil in the flower-pot is very dry, it needs (water). 2) you don't need (put on) your coat because it's very warm outside. 3) my flat wants (repair). 4) famous actors needn't (introduce) them selves. 5) the back board is dirty, it needs (wipe). 6) the shoes need (polish). 7) your shirt has a hole, it wants (mend). 8) you room needs (tidy). 9) the room needed (clean). 10) (learn) foreign languages is very useful. 11) my hair wants (cut) but i never have time to do it. 12) students need (cheer up) before their exams.