Exercise 1: Liệt kê các cụm từ sao cho hợp lý:
1/ by taxi, by train, …………………………………………………………………………………………………………………………….
2/ last summer, last ……………………………………………………………………………………………………………………………
3/ went, came, ……………………………………………………………………………………………………………………………………
4/ Sam Son Beach, Phu Quoc Island, ……………………………………………………………………………………………………