unanimous 全體一致的，一致同意的

undertake 著手做， 從事 ～ an attack

undesirable 不合意的，不受歡迎的

uneasy 心神不寧的，不安寧的

virtue 美德，德行 Among her many ～s are loyalty ,courage, and? truthfulness

substitute 代替者，代替物 He is the doctor’s ～ during holidays times

subtle 微妙的，巧妙的 His whole attitude has undergone a ～ change

subtract 減，減去 Subtract 4 from 10 you get 6

succession 連續(xù)，一系列 a ～ of debates

suck 吸，A large mosquito was sucking blood from the back of her hand

vital 有生命力的 The heart is a ～ organ

void 空的 a ～ space

wedge 楔子，三角木 Please put a ～ in the door so that it will stay open

diffuse 四散開；漫射

yield 生產(chǎn)，產(chǎn)生，帶來 This orchard ～s apples and pears.

zeal 熱心，熱忱，熱情 a man of ～

zigzag之字形的，彎曲的? a ～ road

wander 漫步，徘徊 He ～ed home

ward 病房 a 4-bed ～