问题
选择题
Only after they had discussed the matter for several hours ________a decision．[ ]
A．they reached
B．did they reach
C．they reach
D．do they reach
答案
答案：B
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Only after they had discussed the matter for several hours ________a decision．[ ]
A．they reached
B．did they reach
C．they reach
D．do they reach
答案：B