The idea of growing grass on the top of buses and taxies___other people to think green in other ways.
A. helps
B. inspires
C. prevents
D. stops
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The new type of machine is definitely special and amazing, but it___not be perfect for everyone.
A. might
B. has to
C. ought
D. need
Whoever lives around that beach___find life there dreamlike.
A. would
B. need
C. shall
D. ought to
To make our neighborhood more beautiful, we needn‘t do much more than make a little___in our daily life.
A. option
B. goodness
C. thing
D. change
Campaigns began in the early 1980s, when people___the negative effects of CO2 emission.
A. realize
B. realized
C. have realized
D. had realized