问题
_____ there is still a long way to go, we believe that the doctor-patient relationship in China is gradually improving.
A:Because
B:Unless
C:Although
D:Once;
B:Unless
C:Although
D:Once;
正确答案是：
同类题型
________ the 2020 Olympic Games will be held in Beijing is not known yet
On the contrary, I think it is Truman, ______ you, ______ to blame.
He is not easy-going, but his trust in his friends will last forever once _______.
It seems that the aged people _________ the H7N9 moreeasily from the recent cases.