Gap (笔试：gap 缺口 ， 裂口 = opening)
Generate 产生, 发生
Given = particular
gap

hence =therefore
harsh =drastic
hazard=danger
haul (拖拉, 拖运 )= pull
Heightening (提高，升高) = increasing
hider = interfere ???? (笔试：hide = conceal)
highlight /layer==inner ?????
Hub 中心=center
Hydroelectric (adj.水力 发电的 )
highlight/layer---inner
hider-interfere
heightening--increasing
host--great number
世纪末19世纪初美国制造业的革新.其中有一题
tailors, butchers and a (host) of trades began to ...
hub--center,
hollow n.洞, 窟窿, 山谷 adj.空的, 虚伪的, 空腹的, 凹的 adv.<口>彻底vi.形成空洞 vt.挖空, 弄凹
hamper--make difficulty
heed--notice
hold -- propose
hold--keep up
heighten--increase