Question

Mary must keep her mind on her medical studies now, so it would be years ______ she could think...

Mary must keep her mind on her medical studies now, so it would be years ______ she could think about marriage. A．before B．when C．since D．until

Answer 1

A

考查连词。Before 在什么之前，才，就，when 当什么的时候，since 自从，until 直到，句意：现在玛丽把心思都放在医学研究上，因此，再过几年他才可能考虑结婚。故选A。