题目内容
【题目】ever since while as soon as since before until however
【1】I'll leave __________ I'm ready.
【2】One can't see air；__________，it does exist.
【3】The telephone rang __________ I was in the garden.
【4】__________ we came to the university, we have learnt quite a lot，
【5】I've never got any letter from him __________ he left.
【6】Only two days remained __________ the examination.
【7】He worked in Hong Kong __________ his father found a job for him in Canada.
【答案】见解析
【解析】【1】as soon as
【2】 However
【3】 while
【4】 Since
【5】 ever since
【6】 Before
【7】 until
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