单选题
The teacher was busy ______ sums upon the blackboard. She was too busy ______ the students' questions.
A、
to write out; answering
B、
to write out; to answer
C、
writing out; to answer
D、
writing out; answering
【正确答案】
C
【答案解析】
本题为句型搭配。be busy doing something 意为“忙于做某事”；too busy to do something 意为“太忙碌以至于不能做某事”。本题大意为：老师忙着在黑板上写算术题，她太忙了，没法回答学生的问题。
提交答案
关闭