问题

It has been two years _________ he came to China.
A:since
B:after
C:before
D:till
B:after
C:before
D:till
正确答案是:
同类题型
What_______ your father do? — He is a teacher.
Has Sam finished his report?—I have no idea. He _______ it in his office the whole morning.
I have some problems my Chinese learning. Can you help me with it? —Sure.[ ]
Nowadays young people have their personal look. They want to ____ their personality in this way.