The job was a great challenge and the bad weather our difficulties．
A. added to
B. added
C. added up to
D. added in
网友回答
(答案→)A. added to
B. added
C. added up to
D. added in
解析：考查add有关的短语。Add to增加；add up to共计达…;结合句意可知A正确。句意：这项工作是一个很大的挑战，糟糕的天气又增加了我们的困难。