【題目】Many scientists believe that robots ______ able to talk like humans in 50 years.

A．were B．a(chǎn)re

C．will be D．have been

【答案】C

【解析】

試題分析：句意：許多科學(xué)家認(rèn)為，五十年過(guò)后，機(jī)器人將能夠像人類(lèi)一樣說(shuō)話。描述“五十年后”將要發(fā)生的動(dòng)作或狀態(tài)，用一般將來(lái)時(shí)態(tài)。故選C。

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