问题
选择题
What _____ your parents _____ at nine last night? [ ]
A. did; do
B. were; doing
C. are; doing
D. was; doing
答案
答案：B
搜题请搜索小程序“爱下问搜题”
What _____ your parents _____ at nine last night? [ ]
A. did; do
B. were; doing
C. are; doing
D. was; doing
答案：B