问题
选择题
—_____ you ______ out the problem, Sam?
—Not yet, but I'm going to. [ ]
A. Did; work
B. Are; working
C. Have; worked
D. Will; work
答案
答案：C
搜题请搜索小程序“爱下问搜题”
—_____ you ______ out the problem, Sam?
—Not yet, but I'm going to. [ ]
A. Did; work
B. Are; working
C. Have; worked
D. Will; work
答案：C