______ your brother ______ a magazine from the library?[ ]

A. Are; going to borrow

B. Is; going to borrow

C. Will; borrows

D. Are; going to borrows

（）是开展状态检修的关键，应通过持续开展设备状态跟踪监视，综合停电试验、带电检测、在线监测等各种技术手段，准确掌握设备运行状态和健康水平。