--_______________? -- Orange, I think.
45. The twins look much like each other, but they are different _____ nature.
44. _____ the _____ of modern industry, the pollution is becoming more and more serious.
43. Our national scenery Zhangjiajie is so charming that it is _____ description.
42. In China children, even in their twenties depended _____ their parents _____ food and clothing.
41. During her study in Massachusetts Institute of Technology she has got the degree _____ PhD, and it is a degree ______ chemistry.