（）是对指定设备的诊断测试，要尽快取得结果。
A.例行测试
B.立即测试
C.外线测试
参考答案：B
--- Can I see the headmaster at the moment, please ?
--- I’m afraid not. He _______out. He _____in 10 minutes.
A．goes; comes
B．gone; came
C．will go; will come
D．has gone; will come back
