MIP.watch('count', function (newVal, oldVal) { fetch('http://www.chazidian.com/kaoshi/ajaxapi/?action=guanzhu&id=188007&type=2') .then(function (res) { var follows2 = MIP.getData('follows') if(follows2==1){ MIP.setData({ follows:2, title:'收藏' }) } if(follows2==2){ console.log(2) MIP.setData({ follows:1, title:'已收藏' }) } }) .catch(function (err) { console.log('数据请求失败!') }) })

John'sscoreonthetestisthehighestintheclass;()helastnight.

A、muststudy
B、shouldhavestudied
C、musthavestudied
D、issuretostudy
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正确答案:

C

答案解析:

「句意」 约翰的考试分数全班最高;他昨天晚上一定学习了。

「难点」 表示对过去某一动作行为的猜测须要用must have done 这一句型结构。

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