subway line 4,( ) into use in september,has made traveling in beijing easier 能用having been put吗

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subway line 4,( ) into use in september,has made traveling in beijing easier 能用having been put吗
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subway line 4,( ) into use in september,has made traveling in beijing easier 能用having been put吗
subway line 4,( ) into use in september,has made traveling in beijing easier 能用having been put吗

subway line 4,( ) into use in september,has made traveling in beijing easier 能用having been put吗
我们英语老师有句至理名言,能够简单绝不复杂
这里做插入语,需被动形式
PUT作为过去分词本身够表被动,此时同时出现做选择,就优选PUT
(做题经验,可以多留意类似题型)

能。( ) into use in september 属插入部分 用独立语句 从9月一直投入使用的having been put into use in september

可以用,having been done 强调该动词发生在谓语动词之前,又表被动