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题型：单选题题类：常考题难易度：普通

Please give me a call and let me know ________you will come back for dinner.

A、if B、because C、until D、unless

举一反三

– People all over the world do something good for the earth on April 22nd –– Earth Day.
– Well. ______ what we should do is to make every day Earth Day.

The boy is eight years old, he is to go to school.

they were tired, none of them wanted to have a rest.

—The novel seems a little boring.

—You won't enjoy it_________ you put your heart into it.

A better future is the goal of the Chinese people， _____ it's also the common interest of the world.

Do you know? Will we hold an English party this term? （改为含宾语从句的复合句）

Do you know {#blank#}1{#/blank#} we {#blank#}2{#/blank#} an English party this term?

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