问题
选择题
Tom's mother is busy _______ breakfast for Tom. [ ]
A. cook
B. to cook
C. cooks
D. cooking
答案
答案：D
搜题请搜索小程序“爱下问搜题”
Tom's mother is busy _______ breakfast for Tom. [ ]
A. cook
B. to cook
C. cooks
D. cooking
答案：D