问题
选择题
— Alice, you look puzzled. Have you understood it?
— Yes, I _____ another problem just now.[ ]
A. have thought of
B. thought of
C. was thinking of
D. had thought of
答案
答案：C
搜题请搜索小程序“爱下问搜题”
— Alice, you look puzzled. Have you understood it?
— Yes, I _____ another problem just now.[ ]
A. have thought of
B. thought of
C. was thinking of
D. had thought of
答案：C