UC知道When he was making a delivery,his parents______ unexpectedly.
来源：百度知道 编辑：UC知道 时间：2024/09/20 07:42:06
A.had been arriving
B.had been arrived
C. arrived
D.had arrived
为什么不选C，表示当……的时候，他们来了呢？
B.had been arrived
C. arrived
D.had arrived
为什么不选C，表示当……的时候，他们来了呢？
D
表过去完成时，前面的事态是过去时,所以后面的句子用过去完成时，意思为在什么之前发生的动作对过去某一时刻的影响，arrive是瞬间性动词，故AB不能选。
表影响，这是时态题，不要仅看动词ING，也别看WHEN。
选D
WHEN HE WAS ON HIS WAY HOME
when he was asked how he liked about the paintings
When he got home,he was wet____the skin.
When he was decorating hishouse,he got the bedroom---first.
When he was young, he was too poor to older good clothes.
When he was yong,he was too poor to wear good clothes.
When he was a child, he was always _______ out new
He was very nervous when he was asked to make an _______ speech.
Tom’s parents died when he was a child, so he was __________by his relatives.
he was walking in the forest when he was bitten on the leg by a sanke