单选题：I’d be only too glad to attend your party________I can find

题目内容：

I’d be only too glad to attend your party________I can find a baby-sitter． A．so far as
B．provided that
C．except that
D．unless

参考答案：

答案解析：

In the reference room of the library you can find_________．

In the reference room of the library you can find_________． A．materials for you

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