【題目】Some of my friends are interested in science, but none of them can tell_______.

A.where was this kind of plant foundB.when UFOs appear next time

C.how elephants communicateD.why do some flowers come out in winter

【答案】C

【解析】

句意：我的一些朋友對科學(xué)感興趣，但他們誰也說不清大象是如何交流的。

A. where was this kind of plant found這種植物在哪里被發(fā)現(xiàn)的？B. when UFOs appear next timeUFO下次何時出現(xiàn)？C. how elephants communicate大象是怎樣交流的 ；D. why do some flowers come out in winter一些花為什么在冬天開放？這里是賓語從句用陳述語序，排除AD；選項B應(yīng)該用一般將來時，排除B.。選項C正確。根據(jù)題意，故選C。

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