Choose the best answer

giải thích dùm mình vs ạ
----- Nội dung dịch tự động từ ảnh -----
1: The ...
.system of the body lets us break down the food we eat and turn it into energy
*.......
C. circulatory
2: Our performance was..to be the best one in this competition last night.
C. judged
A. respiratory
B. digestive
D. skeletal
A. cheered
B. appeared
D. seen
3: Tom has an appointment with her doctor this week. He. the doctor tomorrow as planned.
A. will be seeing
B. is going to see
C. will see
D. is seeing
4: Peter: - "What happened to the old mail carner?" John: "He... to a new neighborhood to work".
A. has sent
B. was send
C. was sent
D. sent
5: I think he
the next President of the United States.
A. is going to be
B. will be
C. is
D. would be
6: Jack made me...
.a lot with his hilarious jokes.
....... ..
A. laughing
B. to laugh
C. laugh
D. laughed