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题型：单选题题类：常考题难易度：普通

Apple's iPhones _____easy to learn. Many young people can use them well.

A、am B、is C、are D、be

举一反三

This_____ my uncle and those _______ my grandparents.

—What's his telephone number?

—_______ 625-7886.

“I” _______ a letter.

About ______ of the earth ______ covered with water, but we have less and less available fresh water.

You must work hard. Remember: No road of flower {#blank#}1{#/blank#} (通向) to success.

The T-shirts{#blank#}1{#/blank#}(be) too big for me.

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