1.Our performance was_________.We should make more effort(appoint) 2,They________to us for their ineffective work.(apology) 3,Many students take courses to help with the_______of their knowledge(wide) 4,_________enviroment is necessary to make a nation stronger.(pollute) 5,No longer does_______exist in remote areas(literature) 6,One of the_________of his management is his flexibing(strong) 7,He was_________to do such a thing.He suffered a lot of it.(mistake) 8,After the________of the plane all the passengers fell asleep(take)   giúp e với ạ huhu