My old neighbor Charles enjoys _____ photos. He always goes out with his camera.
enjoy doing sth.“喜欢做某事”为固定搭配。故选选项C。
— We can't enter the room. I can't find my key.
— Is it possible that you _____ it at home?
本题考查动词的词义理解。
结合本题语境可知，我找不到钥匙了，可能把它“遗忘”在家里了，表示“把某物遗忘在某处”要用 leave。