⑴____ A. ruler         B. her         C. teacher   

⑵____ A. bear          B. dear        C. hear     

⑶____ A. hobby         B. over        C. pocket   

⑷____ A. front         B. month       C. orange      

⑸____ A. grass         B. cage        C. skate    

用显微镜观察小鱼尾鳍内血液流动时，毛细血管的辨别特征是（  ）

– What do you think of Lucy's birthday party?
– ________. I hope I can have such a party too.
 

与单细胞藻类相比，草履虫没有的结构是（ ）                              
①细胞质 ②液泡 ③细胞核 ④细胞壁  ⑤细胞膜 ⑥叶绿体