điền dạng đúng của v trong ngoặc
1. The children in my home village used to (go)....................bare-footed, even in winter
2. I wish I (can)..................learn more about other people's tradition
3. Before the 1990s, Viet Nam (have).......................an old banking system
4. It (know)....................that Ha Long Bay was recognized as a World Heritage Site by UNESCO in 1994
điền dạng đúng của v trong ngoặc
1. The children in my home village used to (go) go bare-footed, even in winter
2. I wish I (can) could learn more about other people's tradition
3. Before the 1990s, Viet Nam (have) had had an old banking system
4. It (know) was known that Ha Long Bay was recognized as a World Heritage Site by UNESCO in 1994