请帮我看看这几题英语语法题~

请帮我看看这几题英语语法题~
----which one can I take?（d）
----You can take ______ of them; I’ll keep none.
A.both B.any C.neither D.all
为什么（b）不能选呢?
----May I go and play with Tom this afternoon,Mum?（b）
----No.You can’t go out _____ your homework is being done.
A.before B.as C.until D.as
为啥选b啊?
She is wondering ______ to deal with next.（A）
A.what B.which C.how D.why