他们手脚并用地爬上了陡峭的山坡。
They ___clambered up the steep hill using both hands and feet.
那只小猫正笨拙地爬上树。
The little kitten was ___clambering up the tree awkwardly.
小猫笨拙地爬上高高的书架。
The kitten ___clambers up the tall bookshelf.
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