Find and correct the mistakes in the following sentences

.Find and correct the mistakes in the following sentences
19. We find eating junk food is unhealthy because it will make you gain weight quickly.
C) A. eating  B. is  C. make  D. quickly
D) 20. The study of languages are very interesting.
E) A. The study  B. of  C. are  D. interesting
Read the following passage and choose the correct answer for each gap.
I have a very interesting and (21) hobby. I make short video clips with my digital
camera. It was my birthday present from my parents last year. Since then, I have (22) three
short films. It’s great fun! I started asking my friends and relatives to take (23) in the films. I
have tried to write the story for my video clips. When I have finished the script, I make copies
for the “actors”. Each scene is small and they can look at the words just (24) we start filming.
We film at the weekend in my neighborhood, (25) no one has to travel far. When the video
clip is finished, I invite all the “actors” and we watch the film at my house.
21. A. enjoyable  B. enjoyed  C. enjoying  D. enjoy
22. A. done  B. made  C. played  D. watched
23. A. scene  B. role  C. part  D. film
24. A. until  B. after  C. only  D. before
25. A. so  B. because  C. but  D. although