As drew we closer, I could see a whale       by a pack of about six other killers.

A．be attacked

B．attack

C．being attacked

D．have attacked

以下关于西安事变的叙述，不正确的是[ ]

A．标志国共两党十年内战的基本结束

B．标志抗日民族统一战线正式形成

C．由张 * * 和杨虎城发动

D．中共高瞻远瞩力主和平解决