Look! David is helping his mother _______ the room.       

阅读下面一首宋词，然后回答后面小题。

山居即事

王维

                                                                   寂寞掩柴扉，苍茫对落晖。鹤巢松树遍，人访荜门稀。

                                                                   绿竹含新粉，红莲落故衣。渡头烟火起，处处采菱归。