We've recently studied the_____

----- Nội dung dịch tự động từ ảnh -----
..of stones in the kidneys.
C. information
21. We've recently studied the ..
A. form
B. formation
D. forms
22. A computer is a
communicator which helps you to interact with people around the world.
A. personal
B. personally
C. person
D. personality
23. The Internet helps us
with each other easily and quickly.
A. interaction
B. interactive C. interacting
D. interact
24. There is a great..
of water here.
A. short
B. shortage
C. shorten
D. shortening
25. My mother has just given me a pocket.
..machine.
A. calculations
B. calculating
C. calculations
D. calculator