答案解析

查看更多优质解析解答一举报恩★一般现在时:often,

usually,

always,

sometimes,

never,

seldom,

every week/day/year/month.

.

.

,

once a week,

on Sundays（在某天具体的时间）★一般过去时：ago,

yesterday,

the day before yesterday,

last week/year/ni.

.

.

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