Every day I spend two hours my homework.
A:finishing to do
B:finishing doing
C:to finish to do
D:to finish doing
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判断对错
一个平行四边形可以分成两个面积相等的三角形
已知 1sinφ + 1cosφ =2 2 ,若φ∈(0, π2 ),则 ∫-1tanΦ(x2﹣2x)dx=( )