I hear he can ___(speak) five languages

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I hear he can ___(speak) five languages
I hear he can ___(speak) five languages

I hear he can ___(speak) five languages
答案是speak
解析:hear后可直接接hear sb do sth,也可接从句即这个题目里面的hear (that)he can speak five languages.另外can为情态动词后接动词原形

speak can为情态动词.情态动词后接动词原型.类似还有may must could should need等

speak;can后面接动词原形