用下列方框中的单词的适当形式完成句子，必要时查阅词典。

Joy/joyful, agriculture/agricultural, faith/faithful, origin/original, frank/frankly, merry/merrily, typical/typically, absolute/absolutely

【小题1】The Western festival Halloween has its______in old beliefs about the return of the spirits of dead people.
【小题2】With a smile of______on his face, Timmy went up to the stage to get his prize.
【小题3】According to the report, only 10%-15% of the land in China is good for______.
【小题4】After seeing signs of improvement, she began to have______in the doctor’s skills.
【小题5】We have______confidence in Sarah’s abilities, and we believe she will solve the problem.
【小题6】We enjoy the fresh air and the sunshine in the countryside. We have picnics, read books under big trees, and listen to the birds singing______in the branches.
【小题7】Why don' t we sit down and have a______discussion about your future plan?
【小题8】Some______themes of Chinese New Year paintings are folk tales and gods.