问题描述：
英语过去时 什么时候要加were was?
例句:The cups(?) made of plastic can be reused if we look after them well enough.
问号处要不要加were?
例句:The cups(?) made of plastic can be reused if we look after them well enough.
问号处要不要加were?
问题解答：
我来补答展开全文阅读