Question

Polar explorers have to be extremely _____ to bear the climate and other hardships.

A．tough

B．rough

C．difficult

D．brave

Answer 1

A

考查形容词辨析。句意“极地探险家应该极其坚强，以承受极端的气候和其它困难。”A“坚强的，不屈不挠的”；B“粗糙的”；C“困难的”；D“勇敢的”。故选A。