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题型：单选题题类：常考题难易度：普通

高中英语人教版选修六Unit 2 Poems同步练习 (3)

_______ not necessary, booking in advance is recommended in order to avoid waiting in line.

A、Once B、Since C、If D、While

举一反三

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

It is five years _____his father worked here.

________ I have made this first visit, I hope I can come many more times.

________ the Internet is bridging the distance between people, it may also be breaking some home or will cause other family problems.

Every year, {#blank#}1{#/blank#} makes the most beautiful kite will win a prize in the Kite Festival.

Olympic athletes train hard {#blank#}1{#/blank#} they can get good grades at the final competition. (状语从句)

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