After two months’ training the astronauts are to adapt to the conditions of weightlessness

问题补充：

After two months’ training，the astronauts are to adapt to the conditions of weightlessness.

A. accustomed

B. coming

C. realized

D. succeeding

答案：

(答案→)A. accustomed

B. coming

C. realized

D. succeeding

解析：考查固定词组。固定词组be accustomed to…习惯…适应…；句意：两个月的训练以后，宇航员们已经习惯并能适应失重的环境了。故A正确。