问题
选择题
They have always treated us with open hands and we must be generous ________.
A.in return
B.in addition
C.in vain
D.in case
答案
答案:A
in return意为“反过来”;in addition意为“而且”;in vain意为“徒劳地”;in case意为“万一”。根据句意“他们一向慷慨地待我们,所以我们反过来也得对他们大方一些”可知,答案为A。