Once there lived a very small re ant. It was the smallest among others. The ant felt meaningless so it decided to isolate itself. It
(43)......... a tree and found a bird's nest with several eggs in it. (44)..........., there was a snake intending to swallow the eggs.The red ant could not bear the snake and it bit the snake as strong as it could. Feeling the pain, the snake left the nest. The red ant was (45).......... as it saved the eggs from the snake.
43) a. climb c. climbed 44) a. suddenly c. consequently
b. climbs d. is climbing b. fortunately d. finally
45) a. sad c. disappointed
b. angry d. happy