题目内容:
Wolfgang's father told him he couldn't play the piano yet because______.A. his sister was taking lessons
B. he had to help his mother
C. he was too small
D. he had to wait for his sister to finish practising
参考答案:
A. his sister was taking lessons
B. he had to help his mother
C. he was too small
D. he had to wait for his sister to finish practising