企源知识库

We didn’t really realize how much support we had until we _____ back home.
A、would come
B、comes
C、have come
D、came
【正确答案】：D
【题目解析】：not …until 句型中，until后面接一般时态，即一般过去时或者一般现在时，主句是过去时态，因此从句也用相应过去时态。