bài 3.
1.by coach, by underground, by bus, by motorbike,....
2.last week, last weekend, last year, last month, ....
3. got, flew, swam, read,....
4.Nha Trang beach, Ha Long bay, Hoi An ancient town, Hue Imperial City,...
Bài 4.
1. go ⇒ went
2. live ⇒ lives
3. with ⇒ by
4. take ⇒ took
5.has ⇒ had
6.hometower ⇒ hometown