... Chọn who, which hoặc that điền vào chỗ trống. 1. I met Mary, . asked me to give you this.2. The train Ann caught was the 12:30.3. The paper, are on the table, are very important.4. The new stadium, ... afraid of mice.11. She wants to work for companies . produce baby toys.12. I went to see the doctor, . told me to rest for a few days.13. The man is talking to my father spent fifteen minutesmeasuring ... evening.18. Hell be ill if he(not stop) worrying so much. 19. We will never get there on time if the train(not leave) soon.20.You will never pass your exam if you(not work) harder....