短语填空

【小题1】He was already____________________practising the new music.
【小题2】“Do you think the murderer will__________________the crime？”The boy was staring stubbornly at his lap again.
【小题3】It is said that body language____________55 percent of a first impression while what you say just 7 percent.
【小题4】The real challenge is________light________scattering.
【小题5】I'm going to__________________this tour to explore the history of the castle.