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A. /; an; the B. a; the; / C. the; an; the D. a; the; the
A. 不填; a B. a; 不填 C the; a D. a; the
One day Mark was walking in a valley with his pet dog, Zorro. All of sudden, Mark slipped and fall to the valley. He was so serious hurt that he lay in the stream, lost consciousness. Zorro hurried down and pulledhim out the water. As Mark was wet and cold, the dog lay on top of him, trying to keep it warm. Unluckily,Mark was saved. This shows clearly that animals are our good friend and we should be friendly to them. Instead of killingor eat wild animals, we should do our best to protect them, especially these dying out. _____________________________________________________________________________________