题文
We laugh at jokes, but seldom about how they work.
（2010 .四川）
| A．we think |
| B．think we |
| C．we do think |
| D．do we think |
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We laugh at jokes, but seldom about how they work.
（2010 .四川）
| A．we think |
| B．think we |
| C．we do think |
| D．do we think |
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