Question

The astronauts found that ______ the spaceship went further and further into space, it became more and more difficult to control its own movements.

A．if

B．till

C．as

D．while

Answer 1

C

連詞詞義辨析。宇航員發現隨著飛船深入太空控制它的運動越來越難。As表時間意為“隨著”