我不知道这项工程何时完成I have no idea _______ the project _______ _____
我不知道这项工程何时完成I have no idea _______ the project _______ ________ _______.
这些学生何时离校还不知道News hasn't been known _______ the students _______ school.
我们应该怎样帮助这些孩子的问题还没有讨论The problem _______ we _______ help the children has not been discussed.
他们惟一的要求是这个问题应该尽快解决This is their only request _______ the problem _______ be solved as soon as possible.