He _____and his friends took her to hospital just now.[ ]

A. felt excited    

B. became interested      

C. became happy    

D. felt sick

观察下面甲、乙两图并回答问题．

（1）请把甲示意图中的精子、卵细胞和受精卵补画完整．

（2）甲图中的

对应的是乙图中的[______]______，它由[______]______和[______]______构成．

（3）①存在于动植物细胞的______中．