41. In order to make things convenient for the people, the department is planning to set up some ______ shops in the residential area.

　　A) flowing B) drifting C) mobile D) unstable

　　42. Mr. Smith says: "The media are very good at sensing a mood and then ______ it."

　　A) overtaking B) enlarging C) widening D) exaggerating

　　43. This is not an economical way to get more water; ______, it is very expensive.

　　A) on the other hand B) on the contrary C) in short D) or else

　　44. It was the first time that such a ______had to be taken at a British nuclear power station.

　　A) presentation B) precaution C) preparation D) prediction

　　45. ______ that he wasn't happy with the arrangements, I tried to book a different hotel.

　　A) Perceiving B) Penetrating C) Puzzling D) Preserving

　　41.C) mobile 42.D) exaggerating 43.B) on the contrary 44.B) precaution 45.A) Perceiving