The basketball game was invented by a Canadian doctor James Naismith.
A：was called
B：to call
C：named
D：calling
There _______ a boy and two girls in the music room, they are singing.
阳光小学五年级同学参加学校举办的数学竞赛，共有20道题.评分标准是：答对一道题给5分，答错一道题倒扣1分，不答不得分.如果所有参赛同学都答了，那么参赛的同学总分数是奇数还是偶数？
— you your homework?
—No, I haven't．
下列式子没有意义的是（ ）
