请选择并作详细解释
1 I’ll return the book to the library as soon as I ---it.
A will finish B have finished
2 I wish I ---busy yesterday or I ---you with the problem.
A wasn’t,could help B hadn’t been; would help C hadn’t been; could have helped D wasn’t; would have helped
3 Where have you been? I --- to an evening party.A have invited B was invited C have been invited Where have you been什么意思？
4 My dictionary ---. I have looked for it everywhere but still haven’t found it .为什么用is missing不用has lost?
5 Is this raincoat yours? No ,mine ---there behind the door. 为什么用hangs不用is hanging?

1.B 主将从现。
翻译：我一读完这本书，就还给你。
2.C 两个空是队过去情况的虚拟，用虚拟语气。
翻译：我希望昨天不忙，否则就能帮你了。
3.B 表过去的事，用过去时。
翻译：你去哪了？（去了又回来了）
我被邀请去参加了一个晚会。
4.用is missing指不见了，miss只有主动语态，无被动。
lose是及物动词，带宾语，后面加丢失的东西。可以用has been lost
翻译：我的字典丢了，哪里都找不到。
5.这里表示的是经常性，习惯性的动作。所以用一般现在时，
并不强调说话时正发生的动作。