A-A+
(If) you (will buy) one box at the regular pri
问题详情
(If) you (will buy) one box at the regular price, you would receive (another one) at (no) extra cost.
A．If
B．will buy
C．another
D．no
参考答案
正确答案：B
解析：时态错误，应去掉will。在条件状语从句中，用一般现在时表将来。
考点：
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