题目内容
Tony is busy _______ his homework.
A.doing |
B.do |
C.to do |
D.does |
【答案】
A
【解析】固定句型结构be busy doing sth表示忙于做某事。
练习册系列答案
相关题目
题目内容
Tony is busy _______ his homework.
A.doing |
B.do |
C.to do |
D.does |
A
【解析】固定句型结构be busy doing sth表示忙于做某事。