农民仔细地检查每一株麦子。
The farmer carefully examines each ___stalk of wheat.
猎豹悄悄地跟踪着羚羊群。
The cheetah silently ___stalked the herd of gazelles.
猫在花园里悄悄跟踪那只蝴蝶。
The cat was ___stalking the butterfly in the garden.
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