摘要：20．- We usually go hiking for vacation．I like it.but I want to try something more challenging this year． - A．Let’s go． B．Cheer up． C．Like what? D．Take care．
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— We usually go hiking for vacation．I like it，but I want to try something more challenging this year．
— ________
A．Let’s go． B．Cheer up． C．Like what? D．Take care．
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— We usually go hiking for vacation．I like it，but I want to try something more challenging this year．
— ________
| A．Let’s go． | B．Cheer up． | C．Like what? | D．Take care． |