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英语厉害的请赐教Whenandwheretogo(decide)yet.答案是haven'tdecided还是hasn'tdecided或者别的?

题目详情
英语厉害的请赐教
When and where to go ________ (decide)yet.
答案是haven't decided 还是hasn't decided或者别的?
▼优质解答
答案和解析
hasn't been decided
When and where当做时间地点 被视为单数 但是如果说when to go and where to go用复数,因为时间地点被决定 所以被动.