成人的细胞数目约有2×1014个,200多种。人体的每一种细胞( ) A . 形态功能不同,但结构基本相似 B . 都由细胞壁、细胞膜、细胞质和细胞核构成 C . 都是受精卵不断分裂和生长的结果 D . 都完成相同的生命活动 答案:A---Have you received Jack’s plan?
---Yes, but I don’t think his plan is _____.
A.worth being considered
B.worthy to be considered
C.worthy of considering
D.worth to be considered