根据所给图片填上合适的单词。
【小题1】The workers use
________to make a house.

【小题2】There are many tall
________in the city.

【小题3】Where did you put the
________? I need some to light the candles.

【小题4】Plant more
________to make our city beautiful and clean.

【小题5】Thick
________is over there. There must be a fire.
