问题
选择题
It's 7 o'clock. My family ______ dinner at home. [ ]
A. is having
B. are having
C. has
D. have
答案
答案：B
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It's 7 o'clock. My family ______ dinner at home. [ ]
A. is having
B. are having
C. has
D. have
答案：B
面的交角应为（）