更新时间2019-05-28 01:12:09
one half df the earth is in darkness -- the other half ia bright
A as
B while
C since
D because
修正两处手误 df(x)- of;ia(x)- is;
选填 B. while
One half of the earth is in darkness while the other half is bright.
地球的一半处在黑暗中,与此同时另一半处在明亮中。