Why not look up the new word in a dictionary_______you don't know it?
47. ____ in thought, he didn’t notice me when I came into his room.
46. The house _____ in 1808 still remained there.
45. The soup is too hot. Be careful not to your mouth.
44. We must _____ good relations with our classmates because co-operation is essential to us, modern people.
43. The spring breezes gently _____ her cheeks and everything is clothed in green.