题目

水螅常常可以捕到与自己身体差不多大小的猎物，这主要依靠（ ） A . 刺细胞 B . 触手的缠结 C . 发达的肌肉 D . 口的吞噬 答案：A() 10. — Didn’t your brother go to school by bike?—Yes,he did. But he walking to school now.   A. used to; used to   B. use to; used to   C. used to; is used to   D. use to; is used to