viết lại câu sao cho nghĩa không đổi:
1.It's three years since we last visited Ha Noi.
=>We haven't............................
2.You can't take this book away.
=>...................................
3.Huong is 1.60m tall and Hoa is 1.60m tall,too.
=>Huong..........................
4.I wrote a letter half an hour.
=>It took..........................
5.I had a cat once, but I don't any more.
=>I used..................................
6.I couldn't go to school because of my sickness.
=>because......................................
7.Your younger brother is too weak to lift that box.
=>Your brother is not....................................
8.I study English so that I can improve my knowledge.
=>I study English so as....................................