As we were() giving up hope, a letter arriveD.
A.on the point of
B.for the point of
C.to the point of
D.in the point of
正確答案:on the point of
As we were() giving up hope, a letter arriveD.
A.on the point of
B.for the point of
C.to the point of
D.in the point of
正確答案:on the point of