bài 3
1. at ( stationer: cửa hàng văn phòng phẩm ) 2. buy ( fountain pen: bút máy ) 3. shows 4. like
5. because 6. prefers 7. thinks 8. takes
bài 4
1. was coming=> came
2. so had=> so did
3. did you do=> were you doing ( có tgian cụ thể=> quá khứ tiếp diễn )
4. were=> are
5. to come=> come ( let + V)
6. now => bỏ
7. some=> any
8. a=> an ( armchair bắt đầu bằng nguyên âm )
9. afternoon sunday=> sunday afternoon
10. is=> does ( hiện tại đơn )
