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He visited three cities when he stayed in the U.S., New York, Washington and Hou

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He visited three cities when he stayed in the U.S., New York, Washington and Hou

He visited three cities when he stayed in the U.S., ________ New York, Washington and Houston.

[]A.

such as

B.

they are

C.

which is

D.

that is

试题答案

答案:D

解析:

such as列举同类中的部分例子,如果列举前面的全部内容,则要用that is或namely。