I.

1. were playing

2. hasn't eaten

3. wathing

4. to learn

II.

1.librarian

2.  impressive

3. conveniently

4. attractions

III.

1. The final exam has to be taken by all the students.

2. Mary asked me who i talked to when i have problems.

3. Unless someone waters this tree, it will die soon.

4. We haven't met him for years.

5. Tam didn’t finish her work as quickly as I did.

6. Although the snow was heavy, the explorers managed to walk to the village .

I. Chia động từ

1. At nine o'clock last night, my babies were playing with their dolls in the living room.

2. Minh is very hungry now because he has eaten anything since yesterday.

3. I'm looking forward to watching the European Football tournament next week.

4. It takes a long time to learn a foreign language.

II. Viết dạng đúng của từ trong ngoặc

1. The person who takes care of books in the library is a librarian.

2. His performance in Hamlet was most impressive.

3. The house is conveniently situated in the suburb of the city.

4. Reunification Palace is one of the major tourist attractions in Viet Nam. 

III. Viết lại câu với nghĩa không đổi

1. All the students have to take the final exam.

-> The final exam has to be taken by all the students.

2. ''Who do you talk to when you have problems?'' Mary asked me.

-> Mary asked me who I took when I had problems.

3. If no one waters this tree, it will die soon.

-> Unless someone waters this tree, it will die soon.

4. It's years since we last met.

-> We haven't met for years.

5. I finished my work more quickly than Tam did.

-> Tam didn't finish her work more quickly than I did. 

6. Despite the heavy snow, the explorers managed to walk to the village.

-> Although snow heavily, the explorers managed to walk to the village.