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题型：单选题题类：真题难易度：普通

At college, Barack Obama didn't know that he ______ the first black president of the United States of America.

A、was to become B、becomes C、is to become D、 became

举一反三

The novel written by the author sells best, but five years ago no one could have imagined how great a role he in the literary world.

Tony has just arrived here, but I didn't know he until yesterday.

We packed all the hooks in wooden boxes so that they damaged.

Now we can't do without the Internet. But no one could imagine the part it _____ in our daily life 20 years ago.

The local guide told us that we {#blank#}1{#/blank#} (fly) to Cairns tomorrow.

We were all surprised when he made it clear that he ________ office soon.

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