By the time he _____, the bell _____.   [ ]

A. arrived, had rung    

B. get, has rang    

C. reached, had rang

纵隔淋巴结肿大常见于

A．急性粒细胞白血病
B．急性单核细胞门血病
C．红门血病
D．B细胞急淋白血病
E．T细胞急淋白血病