单选题
— Did you have difficulty finding John's house? —Not really. John had given us good directions and we ______find it.
A、
would
B、
could
C、
had to
D、
were able to
【正确答案】
D
【答案解析】
[解题指要] 该题测试短语be able to与情态动词can的区别。表示过去有能力并实际上成功地做到某事，要用was/were able to，不用could。没有做到可用couldn’t或wasn’t able to表示。
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