After half a year's training,the you were made entirely used( ) underwatera to stayb,to stayingc.stayingd.stay
问题描述：
After half a year's training,the you were made entirely used( ) underwater
a to stay
b,to staying
c.staying
d.stay
答
b. 适应
a. 过去常常
选b,意思是:
半年的训练之后,你完全适应在水下停留.
答
b, to staying
答
b
习惯于生活在水下