The natural _________ of economic activity makes long-term predictions difficult.
flow and ebb
ebb and flow
ebb and flowing
ebbing and flow
High production costs can squeeze _________ small businesses from a competitive market.
down
in
against
out
_________ use of chemical fertilizers(化肥) may harm the soil and the environment.
excess
exceed
excessive
exceeding
His calm appearance _________ the anxiety he was actually feeling inside.
belied
belying
lied
lying
The region has experienced a _____ of extreme weather events in the past decade.
successive
success
succeed
succession
Engineers had to _________ the original design to meet the new safety standards.
modify
delete
remove
offer
The school's new rule _____ that all students must wear uniforms during class hours.
limits
prescribes
restricts
sets
The constant scandals(丑闻) have led to a gradual _____ of public trust in the organization.
erosion
eroding
erode
eroded
We're quite happy to _____ our customers wherever they are.
maintain
offer
deal with
service
The _____ in the decline of manufacturing industry began several years ago.
rapid
speeding
acceleration
growth