These books _____ out of the reading room.  You have to read them here.             [ ]

A. must be taken                    

B. can't take

C. can take                          

D. mustn't be taken

中 * * 党在领导社会主义事业中，必须坚持以经济建设为中心，其他各项工作都服从和服务于这个中心。