UC知道He _____ driving around until he found another customer
来源：百度知道 编辑：UC知道 时间：2024/05/27 04:01:15
填"had been"or "was"?
had been
用过去完成进行时,表示过去某段时间之前一直在做某事.
until直到...
说明driving 是he found another customer之前发生的,过去的过去，所以用过去完成时.
had been后面有found,所以过去的过去
he works hard,so he can _____?
I moved that he _____
What he said _____me _____.
He was _____ in French.
I don’t _____ him. He _____ be serious.
how _____ _____ he ______ _______ the army
He can already _____(说) the time.
He wants to _____ a writer.
He is a friend of _____.
he drove _____ through the busy street