单项选择题

Revolutionary developments in both observational and theoretical astronomy ______ in the 1960' s.

A．disputed
B．occurred
C．interfered
D．commended
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After two years of bargaining, the leaders of two countries finally ______ an agreement.
A．made
B．reached
C．joined
D．came
单项选择题
The lost bike of Jim was found ______ in the woods of the park.
A．abandoned
B．collided
C．diverged
D．insulated
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