1. My parents said that ''All of you are old enough..............after yourselves'' A. look B,looks C.looked D.to look 2 My sister.......English for nearly seven years A,learn B.learned C. has learn D.has learn 3.of all the students in my class, Trung is.......... A, intelligent B.more intelligent C. most intelligent D,the most intelligent 4.It is three years since we last........my uncle, Mr.John Smith A,see B,saw C,seen D,seeing 5.Does your grandfather collect stamps?- Yé, he does. He has a good stamp........ A. collect B.collector C.collecting D.collection 6.We should recycle all these used things because our........resources are limited A. nature B,natural C,naturing D, naturally giải thích ra nha