问题
I didn’t know ______.
A:when would the train arrive
B:where could I get the book
C:what has been done
D:who left the message
B:where could I get the book
C:what has been done
D:who left the message
正确答案是：
同类题型
Yesterday my brother __________to say “Happy Birthday” to me from Spain.
Her daughter began to play _____piano when she was five. Now she’s very good at it.
The relationship ___________/bi’twi:n /Chinese and African people is important.
Where is Jack? — In the sitting room. He _______ TV with his brother.
When the teacher ______ how to do the experiment, the bell rang.