Those overseas students volunteer 10 hou
题型：选择题
问题：
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
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