______Which bag do you prefer , the green one or the pink one ______ .I like a light blue one .

下列各句中，没有语病的一句是（ ）

“Professor Wang is at work in ________office” Miss Brown said in ________ low voice

My friend showed me round the town, was very kind of him.

hid himself behind the door, from__________ he could hear the steps of his father clearly