16. (A)fixing some furniture 　　(B)repairing the toy train 　　(C)reading the instructions 　　(D)assembling the bookcase

18. (A)The building of the dam needs a large budget 　　(B)the proposed site is near the residential area 　　(C)the local people fel insecure about the dam 　　(D)the dam poses a threat to the local environment 　　Question19 to21 are based on the conversation you have just heard