题目内容:
By the time the course ends_________, a lot about the culture of this country.
A. we'll learn
B. we are learning
C. we have learnt
D. we'll have learnt
参考答案:
By the time the course ends_________, a lot about the culture of this country.
A. we'll learn
B. we are learning
C. we have learnt
D. we'll have learnt