题干
—Hi, Tina ,we’re going to Sam’s house to celebrate his graduation. Would you like to ?
—Great! Let’s go.
—Great! Let’s go.
A：come u
B：come o
C：come out
D：come along
答案(点此获取答案解析）
D
，
，
的斜率分别为
，
，
，则( )
