问题
选择题
Those overseas students volunteer 10 hours each week in Paris ________ free food and accommodation.
A．in search of
B．in contact with
C．in case of
D．in exchange for
答案
答案：D
in exchange for与……交换；in search of寻找；in contact with与……接触；in case of在……情形下。句意为：为了换取免费的食宿，那些在巴黎的留学生们每周义务劳动10个小时。故正确答案为D项。