Question

(   ) 4. ―China's space technology is developing very fast,isn't it?

       ―Yes. We can      spaceships with people into space and they can return to the

earth safely.

A. put up    B. turn up C. look up    D. send up

Answer 1

4. D send up意为"发射",put up指"提出",turn up指"出现",look up是"向上看"。