Từ 3 âm tiết.

Từ 3 âm tiết.

Từ 3 âm tiết.

A fire-fighter was injured severely while he _______ to put out a fire.

The phone _______ suddenly while Joanna was doing the housework.

Từ 3 âm tiết.

John _______ in the same house since he left school.

Từ 3 âm tiết.

When I came to visit her last night, she _______ a bath.

Từ 3 âm tiết.

When I _______ for my sister in front of the supermarket, a strange man came to talk with me.

Từ 3 âm tiết.

Linda took great photos of butterflies while she _______ in the forest.

By the end of next March, I _______ English for five years.

B. had been studying

Từ 3 âm tiết.

By the end of last March, I _______ English for five years.

Từ 3 âm tiết.

While I _______ at the bus stop, three buses went by in the opposite direction.

Từ 3 âm tiết.

She hurt herself while she _______ hide-and-seek with her friends.

Từ 3 âm tiết.

The boy fell while he _______ down the stairs.

Từ 3 âm tiết.

I _______ along the street when I suddenly heard footsteps behind me.

Từ 3 âm tiết.

When I _______ to the airport, I realized that I _______ my passport at home.

His English has improved a lot since he _______ an English course by Mr. John.

Từ 3 âm tiết.

When we see Mr. Minh tomorrow, I _______ him of that.

I saw a terrible accident while I _______ on the beach.

Từ 3 âm tiết.

I wanted to say goodbye to Jerry, but he _______ when I arrived.

By the time I finish the final term exams, I _______ my first two years' study at university.

Từ 3 âm tiết.

I was angry when you saw me because I _______ with my sister.

My parents have left for English since I _______ at primary school.

Từ 3 âm tiết.

When I return to my hometown, everything _______ a lot.

Từ 3 âm tiết.