用所给单词的适当形式填空。

1. It is a ______________ (sun) day.

2. Everyone ______________ (love) to sing.

3. I ______________ (go) to the park tomorrow.

4. Danny is ______________ (play) the piano now.

妊娠47天，探针进入12cm无阻力，患者有腹痛，可能原因为

A．人工流产综合反应
B．Asherman综合征
C．羊水栓塞
D．吸宫不全
E．子宫穿孔