Question

【題目】A German company has developed a rapid test. (改為被動語態)

A rapid test __________ __________ developed by a German company.

Answer 1

【答案】has been

【解析】

句意：一個德國公司已經開發了一個快速的測試。

根據has developed可知是現在完成時態；a rapid test做主語，是單數名詞，謂語動詞用第三人稱單數形式；謂語動詞變成被動形式has been developed。故答案為has been。