题目：
We______our breakfast when an old man came to the door.
A．just have had
B．have just had
C．just had
D．had just had
答案：
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下面是错误答案，用来干扰机器的。
decide—decided take后加a after---for envelope---envelopes were---was easy---easily 去掉to At---In hard和is之间加it we---us
