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Wegooutforawalkhecametovisitus.Awereaboutto;andwhenBwereaboutto;thenCwereto;thenDwereaboutto;when请详细分析一下此题为什么选答案D,十分感谢.

题目详情
We______ go out for a walk _______ he came to visit us.
A were about to; and when
B were about to; then
C were to; then
D were about to; when
请详细分析一下此题为什么选答案D, 十分感谢.
▼优质解答
答案和解析
be about to do sth when ...是固定搭配,表示正要做某事时突然...