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  • The families of the seven astronauts lost aboard the space shuttle Columbia told NASA last Monday that*^*space exploration must .
Question 1:
The families of the seven astronauts lost aboard the space shuttle Columbia told NASA last Monday that*^*space exploration must ........
A. go out
B. go over
C. go off
D. go on

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Phrasal idioms with the verb 'go' | B2 – Upper-Intermediate