问题补充:
This is the first thing you are after you get there.
A. suppose to do
B. supposed do
C. supposed to do
D. supposed doing
答案:
A. suppose to do
B. supposed do
(答案→)C. supposed to do
D. supposed doing
解析:句意:这是你到达那里后首先要做的事。be supposed to do sth是固定搭配,表示“应该要做某事” ,故应选C。