问题
选择题
To be an astronaut, you must not only be strong in mind, but also be sound mentally and___.
A．eventually
B．willingly
C．potentially
D．physically
答案
答案：D
词义辨析. A.最后;终于 B.欣然的 C.可能的 D.身体上的.句意:要成为一名宇航员,你不仅要有强大的智力,还要在身体上和心理上都要健康.故选D.