只有两个完全相同的三角形可以拼成一个平行四边形；
故选：B．
—Good news. We will have a holiday. .
—I’ve heard of it. But it’s coming in .
A．three days; three days’ time
B．three days’; three days'.
C．three-day; three days
D．three days; three-day time
"______ did you live there" "For about two years."
A. How often B. How far C. How long
