Chia động từ

a. you ever (1.see)……a real robot at work ? - Oh yes, I (2. see)…… it many times.

b. Hoa always (3.watch)………….. TV in the evening.

c. My mother (4. buy )……………… me a pair of shoes for my last birthday.

d. If he  has free time, he (5. go )…………………. swimming.