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Exercise 4: Điền dạng đúng của các động từ đã cho trong ngoặc sử dụng thì quá khứ hoàn thành - quá khứ tiếp diễn

1. My father (work) _______________ for this company since he (graduate) _______________ from his university in 1999.

2. I (have) _______________ dinner when my mother (come) _______________ home.

3. In recent years, there (be) _______________ many changes in this town’s facilities.

4. 30 years ago, he (go) _______________ to France. Since then, he (work) _______________ at a French company.

5. While my father (watch) _______________ TV, my mother (wash) _______________ the dishes.

6. I (do) _______________ my homework, so my teacher is very pleased.