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

A. wereB. are

C. will beD. have been

【答案】C

【解析】

考查時(shí)態(tài)。句意：許多科學(xué)家認(rèn)為，五十年過后，機(jī)器人將能夠像人類一樣說話。描述＂五十年后＂將要發(fā)生的動作或狀態(tài)，用一般將來時(shí)態(tài)。故選C。

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