----- Nội dung dịch tự động từ ảnh -----
1. I __________ busy writing a dissertation.
2. They __________ happy after the trip to the village near Ha Noi last week.
3. Cindy __________ do the homework as she __________ sick yesterday.

Exercise 6. Choose the correct answers.
1. We helped old people at a nursing home __________ Friday.
A. ago B. last C. until D. every
2. The club members __________ Maths to primary students last summer holiday.
A. teaching B. taught C. taught D. teach
3. __________ you pick up litter at the local park yesterday?
A. Did B. Were C. Are D. Do
4. We __________ provide food for homeless children last Christmas.
A. wasn’t B. weren’t C. didn’t D. don’t
5. The students __________ plastic bottles for recycling 2 weeks ago.
A. sent B. exchanged C. reused D. collected
6. My sisters __________ those trees in the schoolyard three years ago.
A. plant B. planted C. were plant D. were planted
7. I __________ calls from lonely people when I __________ on the Help Lonely People project in 2016.
A. answer - am B. was answering - was C. answered - was D. answered - were
8. Volunteers were so happy because they __________ love to those small villages.
A. bring B. bringed C. brought D. are bringing
9. Last week, my brother and I __________ books to the community library.
A. were donate B. donate C. donates D. donated
10. This voluntary organization started to operate three years __________.
A. ago B. before C. last D. during