mother never gave him any chocolates,because she---they were

不选B是因为,consider作"认为"解时,后面还可以接一个宾语和一个动词不定式作宾语补足语,构成复合宾语结构,但这种结构的动词不定式主要是"to be+名词/形容词";有时也可以是其它不定式,不过这种不定式多用完成时。例如:①We always consider him to be a weak leader。我们一直认为他是个能力不强的领导。②They consider Jim (to be) the cleverest boy in their class。他们认为吉姆是他们班最聪明的学生。③I consider her to have done wonderfully in the final exam。我认为她在期末考试中表现得非常出色。注:consider作"认为"解时,后面偶尔也出现接不定式作宾语的情况,不过这时大都用形式宾语it,而将真正的宾语后移。例如:Do you consider it wise to interfere?你觉得干预是明智的吗?四、固定结构"consider。。。as/ to be+名词/形容词"多侧重于表示经过思考"认为……是……"。例如:①We consider his suggestion as having possibilities。我们认为他的建议具有可行性。②They considered the plan as reasonable。他们认为这个计划是合理的