1. My father was pleased when he learned that I had passed the entrance exam to high school.

=> My father learned that I had passed the entrance exam, so he was pleased

Bố tôi biết tin tôi đã thi đỗ nên rất hài lòng.

3. This country is unsafe to visit during summer vacation.

=> It is unsafe to visit this country during summer vacation.

Không an toàn khi đến thăm đất nước này trong kỳ nghỉ hè

4. There has been a dramatic in the number of people learning English.

=> The number of people learning English has increased dramatically.

Số lượng người học tiếng Anh tăng lên chóng mặt.

2. Everybody had gone home when I came to the party.

=> As soon as I came to the party, everybody had gone home.

Ngay sau khi tôi đến bữa tiệc, mọi người đã về nhà.

5. Phong went to the beach after working hard for a week.

=> After Phong had worked hard for a week, he went to the beach

Sau khi Phong làm việc chăm chỉ trong một tuần, anh ấy đã đi biển