A in
B over
C up
D on
A does
B is doing
C has done
D had done
A had been walking
B walked
C were walking
D have walked
A seeing
B see
C saw
D to see
A I am trying
B trying
C I try
D having tried
A having passed
B on passing
C passed
D to pass
A are destroying
B destroyed
C were destroying
D were destroyed
A source
B pile
C amount
D sum
A is observed
B must be observed
C must have observed
D had better observe
A would have said
B would say
C had said
D would said
A From
B On
C By
D In
A More than ever before
B Never before have
C In the past, there have never
D Formerly, there never were
A practice
B tradition
C custom
D habit
A another pants
B the other ones
C others pants
D another pair
A enjoyable
B lively
C pleasing
D funny
A Listing
B To have listed
C Having been listed
D Having listed
A the less / the more loud
B the less / less
C the more late / the more loudlier
D the later / the louder
A so
B so that
C because
D although
A By tradition
B In short
C On the condition
D On the contrary
A permanent
B guess
C complicated
D soak
A amicable
B inapplicable
C hostile
D futile
A advanced
B sprinted
C played
D excluded
A come around
B set up
C made out
D put on
A knowing
B biennial
C involving
D of Southeast Asia
A studying
B law
C at the university
D does
A struck by
B had been
C the tallest of
D had
A made
B mistakes
C in
D because
A with
B are
C many
D in our large
A exchanging
B altering
C transforming
D changing
A truth
B case
C reality
D practice
A but
B so
C when
D then
A had stopped
B has stopped
C stopped
D would stop
A went out
B set out
C went off
D set off
A do
B make
C pay
D carry out
A ticket
B bill
C receipt
D label
A like
B as
C the same as
D such as
A should
B would
C ought to
D might
A justly
B merely
C only
D simply
A Cohabiting couples
B Children outside marriage
C Unmarried children
D Changing view on marriage
A British family types
B British family changes
C British family identity
D British family relation
A extended
B nuclear
C single-parent
D cohabiting
A emotional
B responsible
C important
D rare
A weddings
B funerals
C Christmas
D births
A highest
B second highest
C third highest
D lowest
A born to parents living together
B born to single parents
C registered by both parents
D concerned by cohabiting parents
A women working
B the choice to be lone parents
C high divorce rate
D old age marriage
A shown
B changed
C discussed
D repeated
A married
B living together
C having children
D unusual
A The economic impact of air pollution.
B The effects of compounds added to the atmosphere.
C What constitutes an air pollutant
D How much harm air pollutants can cause.
A negatively
B quickly
C considerably
D admittedly
A most air pollutants today can be seen or smelled
B water vapor is an air pollutant in localized areas
C a substance becomes an air pollutant only in cities
D the definition of air pollution will continue to change
A the components in biogeochemical cycles
B the pollutants from the developing Earth
C the various chemical reactions
D the compounds moved to the water
A They are less harmful to living beings than other pollutants.
B They have existed since the Earth developed
C They occur in greater quantities than other pollutants.
D They function as part of a purification process.
A will damage areas outside of the localized regions
B can be dwarfed by nature's output of pollutants
C will react harmfully with natural pollutants
D can overwhelm the natural system that removes pollutants
A encircled
B circled
C specified
D surrounded
A it is in a localized area
B it can be calculated quickly
C the natural level is also known
D the other substances in the area are known
A beneficial
B separable
C measurable
D special
A Scientists should be consulted in order to establish uniform limits for all air pollutants.
B One of the most important steps in preserving natural lands is to better enforce air pollution laws.
C Human activities have been effective in reducing air pollution.
D To effectively control pollution, local government should regularly review their air pollution laws.
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