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信息发布者：

before we have the Internet
when/while he was playing football yesterday
after you pass your driving test
when it suddenly began to rain
when/while she is cooking
before you hand it in to your teacher
after she went to study in the UK
when they are very tired
till/until
since
since
till/until
since
till/until
till/until
since
√
till/until
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