We agree to reduce our price by 3% you guarantee to open the credit card on time.
A. unless
B. so that
C. even if
D. on condition that
网友回答
A. unless
B. so that
C. even if
(答案→)D. on condition that
解析：考查连词：A. unless 除非B. so that 为了C. even if 即使D. on condition that条件是，句意：我们同意减少价格3%，条件是你保证准时开信用卡。选D。