I don't know why the door remains _____.
(a) shutting
(b) locked
(c) opened
(d) closing
答案:(b)
請問有人可以幫我解釋為什麼答案是b嗎?謝謝!
還有remain用法怎麼用呢?謝謝

(b)和(c)這兩個都是對的答案。"Remain" has a few different uses.

c opened 應該改為 open (adj)d close 改為 closed

答案B無誤!後面就接進行式跟被動式,看句子的描寫