Choose the best answer
khoang vào chỗ chấm .
1 . Where 's Anna ? She 's over there . She standing ... Sarah .
a . on b. under c. next to d. between
2 . It arrives ...... Mexico at nine o'clock .
a. at b. in c. near d. form .
3 . the tutor stands ......... the class .
a . form b. at c . in d. in front of