The North American moose's long legs enable it to move quickly through the woods, stepping easily over downed trees, but predators pursuing it must leap or go around them.
moose's long legs enable it to move quickly through the woods, stepping easily over downed trees, but predators pursuing it must leap or go around them
moose's long legs enable it to move quickly through the woods, stepping easily over downed trees while predators pursuing them must leap or go around
moose's long legs enable it to move quickly through the woods and to step easily over downed trees, but predators pursuing them must leap over or go around them
moose has long legs, enabling it to move quickly through the woods and to step easily over downed trees while predators pursuing them must leap or go around
moose has long legs that enable it to move quickly through the woods, stepping easily over downed trees while predators pursuing it must leap over or go around them
A选项:stepping easily over downed trees对于句子的作用不明确,不清晰;leap over跳过;
B选项:them指代不明确,应该it,来指代moose
C选项:them不能指代单数名词
D选项: them换成it;leap换成leap over;
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