题文
How ________ you say that you really understand the whole text if you have covered only part of it?
| A．can |
| B．must |
| C．need |
| D．may |
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How ________ you say that you really understand the whole text if you have covered only part of it?
| A．can |
| B．must |
| C．need |
| D．may |
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