问题
选择题
It was the largest experiment we had ever had; it _____ six hours.
A．ended
B．finished
C．prolonged
D．lasted
答案
答案：D
last vi. (for) 持续。
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It was the largest experiment we had ever had; it _____ six hours.
A．ended
B．finished
C．prolonged
D．lasted
答案：D
last vi. (for) 持续。