根据下列句子所给汉语意思或提示，写出空缺处单词的正确形式。

小题1:Several companies are________(竞争)for the contract. 

小题2:We have ________ (做广告)our new product in the local newspaper. 

小题3:________(除去) the mud from your shoes before you come in.

小题4:She took a ________ (点着的)candle into the room, and the dark room lit up at once.

小题5:The new company welcome         (apply) form graduates from Tsinghua University.

锅炉给水原水悬浮物的处理，应符合的要求有______。

A．悬浮物的含量大于5mg/L的原水，在进入顺流再生固定床离子交换器前，应过滤

B．悬浮物的含量大于2mg/L的原水，在进入逆流再生固定床或浮动床离子交换器前，应过滤

C．悬浮物的含量大于20mg/L的原水或经石灰水处理后的水，应经混凝、澄清和过滤

D．悬浮物的含量大于6mg/L的原水，在进入顺流再生固定床离子交换器前，应过滤