Uncle Tom has worked as a teacher __ he left school in 1999.a.before b.since c.after d.for
Uncle Tom has worked as a teacher __ he left school in 1999.a.before b.since c.after d.for
大哥大姐幫幫忙,選什么,為什么這樣選,
大哥大姐幫幫忙,選什么,為什么這樣選,
英語人氣：350 ℃時間：2020-03-21 13:11:33
優(yōu)質(zhì)解答
b since引導(dǎo)的時間狀語從句,主句用現(xiàn)在完成時態(tài).
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