16. Traditionally, the “ ao dai” …………………..by both men and women.
-> C. was frequently worn (bị động)
17. The material used to make jeans was very ……………..and it didn’t wear out easily.
-> A. solid
18. In the 1960s, it was the …………………for women to wear very short skirts.
-> D. fashion
19.The word jeans comes from a kind of material that .................in Europe .
-> D. is made
20. The ao dai .................................for years.
-> C. has been modernized (hiện tại hoàn thành bị động)