What does the root “posit” mean？A.To place to pu

What does the cancellation of the 16－day flight mean？A．The scientists on the ground are pu

What does the phrase" to bust the trusts" mean here？A．To break business monopolies.B．To ar

What does the phrase "hook up...with" mean in Paragraph 6？A．To meet someone and become fri

What does "stymie" in the last paragraph mean？A．To prevent.B．To increase.C．To arouse.D．To

What does the phrase "to fend for themselves" （Line 5-6, Para. 1) most probably mean？A．to

What does the phrase "catch up"in Paragraph 5 mean？A．To come from behind and reach someone