He tried to move the sofa upstairs _______ ,but couldn't manage it.
问题描述：
He tried to move the sofa upstairs _______ ,but couldn't manage it.
A his alone B himself C he alone D his own
答
B为社么himself这里表示他自己，他自己尽力把沙发搬上楼，但是没办到。 其他答案都是乱组合的。但是可以=on his own =alone， 其他答案就是根据这2个乱造的。