QUESTIONS 17-27. CHOOSE THE BEST ANSWER TO COMPLETE EACH OF THE FOLLOW...
24. The ________ ,which can travel underwater, is very useful for scientists to learn about the undersea world.
A. aeroplane
B. electronic car
C. spaceship
D. submarine
24. The ________ ,which can travel underwater, is very useful for scientists to learn about the undersea world.
A. aeroplane
B. electronic car
C. spaceship
D. submarine