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题型：单选题题类：真题难易度：普通

If you miss this chance, it may be years ____ you get another one.

A、As B、before C、since D、after

举一反三

________ the job takes a significant amount of time, most students agree that the experience is worth it.

One Friday, we were packing to leave for a weekend away my daughter heard cries for help.

Usually the joy of travelling is not in arriving at your destination _____ in the journey itself.

Mike used to be a top student, but he has fallen behind ________ he lost himself in playing computer games.

When a plane is landing, passengers need to keep their seat belts fastened {#blank#}1{#/blank#} it has come to a complete stop.

Bob and Jim have been good friends {#blank#}1{#/blank#} (自从)they joined the same tennis team.

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