shortage照反义词
spontaneous = unplanned
sacred = holy
subject to = vulnerable to
susceptible to = prone to
succession----series
sparse,文中着反义词 rich
scrap=fragment
set in motion = start (使 开始运转， 如 set the plan in motion)
Severe = harsh
SHIFT
share = proportion (proportion 比例, 均衡, 面积, 部分vt.使成比例, 使均衡, 分摊)
silhouette = outline (silhouette n.侧面影象, 轮廓)
Simultaneous (同时发生的)= at the same time
Site 
Solicit = request (solicit v.恳求 ，请求)
Specified (详细说明) = stated
a matter of speculation (思索，推测，投机)= supposition (speculation的同义词)
stunning = dramatically(不?定) 都在句中? (stunning: very surprising, very impressive ，另人印象深刻的; dramatically: 有戏剧表现力的，引人注目的)
sturdy = strong
subsequent (后来的，随后的) = later
supplant = replace
Susceptible to (容易….的): prone to
settle down
stem from --- grow out of
set in motion的同义词，选项有start等
Webster地解释比较好：
to give impulse to
shift
specified : stated
silhouette =outline
solicit==request
severe--harsh
sacred--holy
strict
staple--important
simultaneous
soaked--absorbed
split--divided
scorching--exceeding hot
site--location
stay
singularly--particularly
stint 紧缩节省
slightest 最轻微的
sparingly 节俭地
spur--stimulus
staggering 惊人的，巨大的
stunned--hindered
stunt v.阻碍...发育, 妨碍...生长, 作惊人表演, 使绝招 n.发育迟缓, 矮小的人(或物), 惊人表演, 绝技
sumptuous--luxurious
seek
shield--protect
shrink < > spread(反义)
significant-- meaningful (obvious is not right)
spawn--create
spot--identify
snap--break
shied away from--avoid