I ___ to you ___ having taken so much trouble.
A.am grateful …for
B.am ungrateful …as
C.am appreciated… for
D.am dependent… on
正确答案是A
I ___ to you ___ having taken so much trouble.
A.am grateful …for
B.am ungrateful …as
C.am appreciated… for
D.am dependent… on
正确答案是A