1.We had to be patient because it ____ some time before we got the full result.
A. would be B. was C. has been D. had been
2.To his disappointment, the opinion he had stuck ____ out wrong.
A. to turn B. to turning C. to turned D. to be turned.
3. ______himself to alcohol, the boy caused his parents great trouble.
A. abandoned B. being abandoned C. abandoning D. to abandon
求哪位高人帮忙解答为什么选择a,c,c，并详细的解释清楚

1. 主句过去时态(we had...)，because 从句后的动作be(这里意思相当于take)发生于had之后，相当于过去将来时态。
我们必须得有耐心，因为“需要一些时间”才可以得到完整的结果。

2 ..he had stuck to..是定语从句，修饰opinion,所以to在这里是属于动词词组stick to(粘住，所坚持的)，turn这里做the opinion的谓语，turn少s错误，bd时态错误。
To his disappointment, the opinion
(he had stuck to) turned out wrong.
让他失望的是，这个（他坚持的）观点结果是错误的。

3 abandon 这里是及物动词，放纵；放任，一般与oneself一起使用，某人放纵于....
He abandoned himself to despair.
他自暴自弃。
They abandon themselves to drinking.
他们沉湎于饮酒。
所以，答案B(被动语态)不对；这里独立主格结构，表达的是一种持续的状态，或者说，一种正在持续的事实，所以用动词+ing,而不是to + 动词. A abandoned不能用于独立主格。

这个男孩沉湎于纵酒，使得他的父母造成极为烦恼。