The official said rescuers were working_____to find the missing miners in the coal mine blast.
29.Apart from the blood that belonged to the three people, the detectives found only_______clue.
28.The Changbaishan Mountains have a huge variety of scenery, some of the best of__________can only be reached on foot.
27.So far, my home village has changed________recognition.
26.What a pity! The car ran out of sight before I could_________its number.
25.Canada is one of the safest and most welcoming countries you will___________visit.