问题
选择题
—What are you doing?
—I am _________ a letter.[ ]
A. write
B. writing
C. writes
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—What are you doing?
—I am _________ a letter.[ ]
A. write
B. writing
C. writes
答案：B
