皮皮学，免费搜题
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搜题
【多选题】
2 为让客人感到舒心、安心,客房卫生间要做到“四无”,具体有()A.
无水迹
B.
无皂迹
C.
无发迹
D.
无灰尘
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】I had just started back for the house to change my clothes ________I heard voices.
A.
as
B.
when
C.
after
D.
while
【简答题】I had just started back for the house to change my clothes I heard voices．
【单选题】It’s years since I _______ him last time, and I haven’t written back to him.
A.
heard of
B.
heard out
C.
heard about
D.
heard from