题文
—The problem is too difficult，can you show me _____，Wang Le?
—Sure.
| A．what to work it out | B．what to work out it |
| C．how to work it out | D．how to work out it |
—The problem is too difficult，can you show me _____，Wang Le?
—Sure.
| A．what to work it out | B．what to work out it |
| C．how to work it out | D．how to work out it |
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