题文
If I were rich, I should help them out. _________，I can do nothing.
| A．As is often the case | B．As is it |
| C．As the case is often | D．As it is |
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If I were rich, I should help them out. _________，I can do nothing.
| A．As is often the case | B．As is it |
| C．As the case is often | D．As it is |
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