These ideas provided the ______ for her low-carbon program.
A. inspire
B. inspiration
C. inspiring
D. inspired
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Let everybody ______ something to reduce environmental pollution.
A. do
B. to do
C. doing
D. done
The environment on this planet is worsening, for few people ______ measures to protect it in the last twenty years.
A. takes
B. took
C. have taken
D. should taken
I would advise that every teacher ______ further academic research aboutteaching methods because that will guarantee his success.
A. doing
B. to do
C. do
D. did
A fashion designer had better ______ up to date with emerging fashion trends.
A. keep
B. to keep
C. keeping
D. kept